diff --git a/Cargo.toml b/Cargo.toml
index 050a474..0f6fd6a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,5 +7,7 @@ edition = "2021"
 [dependencies]
 anyhow = "1.0"
 itertools = "0.10"
-num-traits = "0.2.15"
+lazy_static = "1.4"
+num-traits = "0.2"
+regex = "1.7"
 thiserror = "1.0"
diff --git a/data/day07/example01.txt b/data/day07/example01.txt
new file mode 100644
index 0000000..bcbb513
--- /dev/null
+++ b/data/day07/example01.txt
@@ -0,0 +1,23 @@
+$ cd /
+$ ls
+dir a
+14848514 b.txt
+8504156 c.dat
+dir d
+$ cd a
+$ ls
+dir e
+29116 f
+2557 g
+62596 h.lst
+$ cd e
+$ ls
+584 i
+$ cd ..
+$ cd ..
+$ cd d
+$ ls
+4060174 j
+8033020 d.log
+5626152 d.ext
+7214296 k
\ No newline at end of file
diff --git a/data/day07/input.txt b/data/day07/input.txt
new file mode 100644
index 0000000..303ed1c
--- /dev/null
+++ b/data/day07/input.txt
@@ -0,0 +1,1135 @@
+$ cd /
+$ ls
+233998 glh.fcb
+184686 jzn
+dir qcznqph
+dir qtbprrq
+299692 rbssdzm.ccn
+dir vtb
+$ cd qcznqph
+$ ls
+32148 lhsrj.fnr
+dir lnj
+dir mtr
+dir mznnlph
+dir pdtpt
+24836 rsjcg.lrh
+dir vrj
+dir wrqcfl
+$ cd lnj
+$ ls
+12592 tlh
+$ cd ..
+$ cd mtr
+$ ls
+118870 twdhlmp.gbw
+$ cd ..
+$ cd mznnlph
+$ ls
+240977 fmmhnhtf
+dir gbhcnts
+dir gsbjrrd
+dir pmwcs
+dir qtbprrq
+286007 rhnjndsq.gst
+dir twdhlmp
+283716 twdhlmp.rpr
+$ cd gbhcnts
+$ ls
+dir fctrnwb
+dir gbhcnts
+46017 gft.hvm
+234925 gjsnzbtw.ncd
+dir nvnwh
+dir srslsjp
+dir swtlfsv
+66115 tgpmsb
+64086 tqnvb
+308270 tqwfpnbn.btp
+$ cd fctrnwb
+$ ls
+112643 qhcdd
+$ cd ..
+$ cd gbhcnts
+$ ls
+26196 cmttgsmm.bdn
+317410 fthqln
+dir lwshph
+32809 tdmfc
+dir tqcllnv
+dir twdhlmp
+$ cd lwshph
+$ ls
+214023 ctqvrzs.jvr
+104432 gbch
+dir gpqgrw
+105909 qshbtd.nml
+dir rhhsfbdd
+dir svvqh
+161439 tqnvb
+60152 twdhlmp.qzw
+$ cd gpqgrw
+$ ls
+dir mbsgrlld
+dir nhb
+dir qtbprrq
+$ cd mbsgrlld
+$ ls
+13247 tsztmlfg
+dir twdhlmp
+$ cd twdhlmp
+$ ls
+236804 mcrd
+$ cd ..
+$ cd ..
+$ cd nhb
+$ ls
+86570 gtvnbsv.zbr
+$ cd ..
+$ cd qtbprrq
+$ ls
+111178 npg.qph
+110775 tlh
+$ cd ..
+$ cd ..
+$ cd rhhsfbdd
+$ ls
+37729 fmmhnhtf
+263415 ljvwzj.btm
+$ cd ..
+$ cd svvqh
+$ ls
+185682 wlcl.fhs
+$ cd ..
+$ cd ..
+$ cd tqcllnv
+$ ls
+dir cbdj
+dir ccsfm
+55264 tqnvb
+267792 wlcl.fhs
+$ cd cbdj
+$ ls
+128247 fmmhnhtf
+dir mtnbs
+240520 ngmw.clj
+30569 qbqltr.lbw
+188801 zwdpp
+$ cd mtnbs
+$ ls
+dir bsfbrmh
+dir ftmnrwm
+$ cd bsfbrmh
+$ ls
+dir tltvzp
+$ cd tltvzp
+$ ls
+312469 dnst.sbm
+$ cd ..
+$ cd ..
+$ cd ftmnrwm
+$ ls
+278974 nlztftc.zhb
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ccsfm
+$ ls
+4017 wlcl.fhs
+$ cd ..
+$ cd ..
+$ cd twdhlmp
+$ ls
+dir qtbprrq
+$ cd qtbprrq
+$ ls
+dir tdpz
+$ cd tdpz
+$ ls
+210400 fmmhnhtf
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd nvnwh
+$ ls
+dir jlpbbds
+dir pphv
+285452 qtbprrq
+$ cd jlpbbds
+$ ls
+7058 vmrcqz
+$ cd ..
+$ cd pphv
+$ ls
+290310 msz.swz
+$ cd ..
+$ cd ..
+$ cd srslsjp
+$ ls
+dir nnz
+192902 twdhlmp.vgp
+$ cd nnz
+$ ls
+215711 tlh
+$ cd ..
+$ cd ..
+$ cd swtlfsv
+$ ls
+274236 frwncp.gff
+$ cd ..
+$ cd ..
+$ cd gsbjrrd
+$ ls
+dir dnst
+dir gbhcnts
+61000 gqdf
+175813 jvz
+dir ldqjzrtp
+$ cd dnst
+$ ls
+124352 dnst
+220618 mzsqzbfz.qfd
+134211 qmrvh
+dir qqlm
+dir qtbprrq
+223840 tlh
+dir twdhlmp
+24794 wfb.rtf
+$ cd qqlm
+$ ls
+113976 wlcl.fhs
+$ cd ..
+$ cd qtbprrq
+$ ls
+212775 qtbprrq.ngs
+$ cd ..
+$ cd twdhlmp
+$ ls
+308083 fzhd
+63311 wlcl.fhs
+$ cd ..
+$ cd ..
+$ cd gbhcnts
+$ ls
+dir dlvhzdbg
+$ cd dlvhzdbg
+$ ls
+305798 twdhlmp
+$ cd ..
+$ cd ..
+$ cd ldqjzrtp
+$ ls
+93085 dcvfpz.bjl
+264488 zssvm.wdp
+$ cd ..
+$ cd ..
+$ cd pmwcs
+$ ls
+125444 qtbprrq.tgl
+$ cd ..
+$ cd qtbprrq
+$ ls
+dir bjnctfv
+133127 fmmhnhtf
+dir gztmrrff
+dir qtbprrq
+$ cd bjnctfv
+$ ls
+dir cpwrcf
+dir fdjzsfc
+1223 gbhcnts.qvf
+272526 gbhcnts.sgs
+dir qnsdl
+dir snq
+dir tmjnvcbl
+dir vdjqsbr
+271339 wslnqh.rgr
+134589 zzqrbr.fcz
+$ cd cpwrcf
+$ ls
+143124 pdr
+$ cd ..
+$ cd fdjzsfc
+$ ls
+dir gbhcnts
+dir nqpbzvpq
+$ cd gbhcnts
+$ ls
+151265 jrdvt.fcg
+11872 tlh
+$ cd ..
+$ cd nqpbzvpq
+$ ls
+dir hpwhslq
+27858 ljvwzj.prq
+dir nzcnb
+$ cd hpwhslq
+$ ls
+136646 bqgj.wvw
+252823 ngmw.clj
+137072 tqnvb
+$ cd ..
+$ cd nzcnb
+$ ls
+99882 twdhlmp.grg
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd qnsdl
+$ ls
+8925 fmmhnhtf
+dir mnzqwfnh
+206990 vqgrhqgc
+$ cd mnzqwfnh
+$ ls
+271442 bmztfjlc.lzr
+$ cd ..
+$ cd ..
+$ cd snq
+$ ls
+25995 tqnvb
+$ cd ..
+$ cd tmjnvcbl
+$ ls
+dir gclzbvt
+$ cd gclzbvt
+$ ls
+dir jtfddbs
+$ cd jtfddbs
+$ ls
+10564 pdf.tsj
+32415 tlh
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd vdjqsbr
+$ ls
+256668 cwbd
+265036 fmmhnhtf
+$ cd ..
+$ cd ..
+$ cd gztmrrff
+$ ls
+52260 bdqcl.bdw
+dir lsss
+120102 tlh
+$ cd lsss
+$ ls
+13729 wlcl.fhs
+$ cd ..
+$ cd ..
+$ cd qtbprrq
+$ ls
+dir bttpq
+dir lcvgwpt
+$ cd bttpq
+$ ls
+216247 nnlv.dgl
+138688 wlcl.fhs
+$ cd ..
+$ cd lcvgwpt
+$ ls
+dir dth
+198570 tsqgm.zht
+dir zbcstsb
+$ cd dth
+$ ls
+dir cqmbtj
+120437 hdqp.vhq
+dir vpzn
+$ cd cqmbtj
+$ ls
+11882 sdngnzb
+$ cd ..
+$ cd vpzn
+$ ls
+dir jqbz
+271714 plcq.bfg
+$ cd jqbz
+$ ls
+dir qqhnfglj
+136307 stncbrm
+177843 tlh
+168253 tqnvb
+297085 wcn
+$ cd qqhnfglj
+$ ls
+197471 twdhlmp
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd zbcstsb
+$ ls
+298115 bvljmpc.gss
+308872 ljr.lzl
+201657 ngmw.clj
+170617 ppln
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd twdhlmp
+$ ls
+dir dbb
+277215 ngmw.clj
+310263 twdhlmp.wvs
+dir vsfrqsnl
+$ cd dbb
+$ ls
+258300 tqnvb
+$ cd ..
+$ cd vsfrqsnl
+$ ls
+dir gbhcnts
+12285 tlh
+$ cd gbhcnts
+$ ls
+248251 dnst.bcs
+91471 gbhcnts.ntr
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd pdtpt
+$ ls
+164477 flcgj.zwr
+dir ljvwzj
+51483 ljvwzj.htl
+dir pbtr
+dir qtbprrq
+dir rrhcsn
+$ cd ljvwzj
+$ ls
+dir nsq
+133318 qtbprrq.gqq
+166365 rnfbl.ljh
+130617 tlh
+16112 vbw
+$ cd nsq
+$ ls
+dir fwfcmfbz
+$ cd fwfcmfbz
+$ ls
+71451 zcc.ngn
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd pbtr
+$ ls
+dir qtbprrq
+$ cd qtbprrq
+$ ls
+117780 gjqbnrv.sdl
+$ cd ..
+$ cd ..
+$ cd qtbprrq
+$ ls
+269746 dld
+dir fcmbv
+42544 mlzvd.vcw
+165396 nbtlfm.vzq
+dir sbtl
+dir twdhlmp
+$ cd fcmbv
+$ ls
+202047 wdzcrg.mcg
+$ cd ..
+$ cd sbtl
+$ ls
+dir dbcdf
+dir fbz
+dir lvz
+dir ncnwbsdh
+dir rft
+23523 zphlfqf.phv
+$ cd dbcdf
+$ ls
+dir dhdw
+dir dvtjfhvm
+182513 lclmdwr
+63921 ngmw.clj
+dir qqmddq
+318020 tlh
+dir twdwfj
+83108 vmwlfdlf
+121901 wlcl.fhs
+$ cd dhdw
+$ ls
+dir qtbprrq
+dir twdhlmp
+dir wbllhmd
+$ cd qtbprrq
+$ ls
+111984 fhc.tzm
+$ cd ..
+$ cd twdhlmp
+$ ls
+277414 fwfqbb.dpj
+$ cd ..
+$ cd wbllhmd
+$ ls
+dir dnst
+dir jqz
+dir lbdclnfb
+dir ljvwzj
+dir mzfdg
+96340 ngmw.clj
+dir twdhlmp
+dir wmcfzznt
+147877 zwgvvd
+$ cd dnst
+$ ls
+310179 fmmhnhtf
+243908 twdhlmp
+$ cd ..
+$ cd jqz
+$ ls
+94739 twdhlmp
+$ cd ..
+$ cd lbdclnfb
+$ ls
+112509 ljvwzj
+$ cd ..
+$ cd ljvwzj
+$ ls
+28274 bshlmj.lzc
+84072 tlh
+283462 twdhlmp.ccd
+$ cd ..
+$ cd mzfdg
+$ ls
+282099 hbbrjc.jff
+63535 tlh
+$ cd ..
+$ cd twdhlmp
+$ ls
+283817 jltvl.tgl
+$ cd ..
+$ cd wmcfzznt
+$ ls
+294565 fmmhnhtf
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd dvtjfhvm
+$ ls
+292813 qgmvm.fsg
+$ cd ..
+$ cd qqmddq
+$ ls
+11670 dnst.btd
+241275 fmmhnhtf
+196615 fpnmptm
+dir nnzscbvw
+dir qnrr
+$ cd nnzscbvw
+$ ls
+250962 dflhdfz
+$ cd ..
+$ cd qnrr
+$ ls
+dir trzj
+$ cd trzj
+$ ls
+36993 gbhcnts.rdh
+273052 tlh
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd twdwfj
+$ ls
+162470 hfdhmbcq.hwz
+dir qtbprrq
+dir scjzbdsz
+2609 wlcl.fhs
+$ cd qtbprrq
+$ ls
+dir cfmglhwj
+103703 cscftrsr.jbs
+71160 dnst.rbw
+dir nrmp
+311716 qtbprrq
+$ cd cfmglhwj
+$ ls
+dir fmcmjfg
+$ cd fmcmjfg
+$ ls
+82998 ljvwzj.qbd
+8407 nhmmwwzl
+dir qtbprrq
+261949 tlh
+$ cd qtbprrq
+$ ls
+314421 hwqtl
+92593 zcdvf
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd nrmp
+$ ls
+94387 fmmhnhtf
+$ cd ..
+$ cd ..
+$ cd scjzbdsz
+$ ls
+6861 dgzhldd.dhs
+dir gbhcnts
+dir qtbprrq
+dir sfdl
+$ cd gbhcnts
+$ ls
+dir qdsrs
+$ cd qdsrs
+$ ls
+25165 ngmw.clj
+$ cd ..
+$ cd ..
+$ cd qtbprrq
+$ ls
+151403 tswd.hpf
+$ cd ..
+$ cd sfdl
+$ ls
+308622 jcmsnj
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd fbz
+$ ls
+dir dgjf
+dir qtbprrq
+$ cd dgjf
+$ ls
+254198 rvf.hfq
+$ cd ..
+$ cd qtbprrq
+$ ls
+dir frlj
+231222 njjfqgt.bph
+dir rjsw
+dir vjhzc
+$ cd frlj
+$ ls
+dir ljvwzj
+$ cd ljvwzj
+$ ls
+57572 ljvwzj.bvh
+$ cd ..
+$ cd ..
+$ cd rjsw
+$ ls
+131875 lbcq.rlc
+272908 mnfs
+$ cd ..
+$ cd vjhzc
+$ ls
+279363 fmmhnhtf
+238051 zdzbb.rfj
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd lvz
+$ ls
+289192 tqnvb
+dir twdhlmp
+$ cd twdhlmp
+$ ls
+dir wqtgwzdn
+$ cd wqtgwzdn
+$ ls
+283475 ghvpfl
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ncnwbsdh
+$ ls
+dir dfrdwfgm
+dir ljvwzj
+dir vgh
+$ cd dfrdwfgm
+$ ls
+279286 mrbwmws.nzd
+197337 nqgq.fhf
+248096 tqs.jfb
+35181 wlcl.fhs
+$ cd ..
+$ cd ljvwzj
+$ ls
+250455 gmph.scm
+147449 ljvwzj
+100189 qfr
+$ cd ..
+$ cd vgh
+$ ls
+244540 bzwrldnz.ldt
+235508 dzm
+dir gbhcnts
+dir qtv
+dir tvtwlt
+262356 wlcl.fhs
+$ cd gbhcnts
+$ ls
+160689 srvpbf.szt
+191895 tqnvb
+$ cd ..
+$ cd qtv
+$ ls
+9491 dnst.szf
+268602 ngmw.clj
+dir pbcrfzz
+39049 rzgqqvlt.nsm
+dir tfpl
+79589 wwcrv.ncv
+$ cd pbcrfzz
+$ ls
+dir stt
+256685 wlcl.fhs
+$ cd stt
+$ ls
+12650 jbdfwj
+$ cd ..
+$ cd ..
+$ cd tfpl
+$ ls
+92079 dfhj
+$ cd ..
+$ cd ..
+$ cd tvtwlt
+$ ls
+dir cqv
+$ cd cqv
+$ ls
+dir vdv
+$ cd vdv
+$ ls
+119483 fmmhnhtf
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd rft
+$ ls
+24341 bjhzvzp.flg
+dir glwdmdt
+$ cd glwdmdt
+$ ls
+288082 jdtlwrzh.wcj
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd twdhlmp
+$ ls
+dir gbhcnts
+154240 wlcl.fhs
+$ cd gbhcnts
+$ ls
+217462 ddzp
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd rrhcsn
+$ ls
+308440 dzbfl.vcg
+dir jbhcpdh
+238941 rnqdz
+dir szljjhc
+$ cd jbhcpdh
+$ ls
+dir bmg
+dir mdqplln
+dir twdhlmp
+dir zbt
+$ cd bmg
+$ ls
+dir djwfl
+dir gbhcnts
+dir ljvwzj
+142159 mwl.psh
+110681 rzmdgbng
+dir zqjbb
+$ cd djwfl
+$ ls
+dir dpfcrjl
+dir rqtz
+$ cd dpfcrjl
+$ ls
+206939 tlh
+$ cd ..
+$ cd rqtz
+$ ls
+232264 tlh
+$ cd ..
+$ cd ..
+$ cd gbhcnts
+$ ls
+186364 ngmw.clj
+248882 twdhlmp
+306411 wjqvlzp
+$ cd ..
+$ cd ljvwzj
+$ ls
+dir dgqw
+$ cd dgqw
+$ ls
+dir mpczlcrz
+dir qtbprrq
+dir twdhlmp
+dir zjsltthh
+$ cd mpczlcrz
+$ ls
+142906 gvd.nnz
+$ cd ..
+$ cd qtbprrq
+$ ls
+179566 fmmhnhtf
+309800 jhwwppc.vcp
+$ cd ..
+$ cd twdhlmp
+$ ls
+dir bhqjhjvp
+$ cd bhqjhjvp
+$ ls
+dir lmj
+dir qmcqggbl
+$ cd lmj
+$ ls
+275070 twdhlmp
+$ cd ..
+$ cd qmcqggbl
+$ ls
+dir mhgnpm
+$ cd mhgnpm
+$ ls
+dir rnzzqr
+$ cd rnzzqr
+$ ls
+126574 pgnlrjs.czj
+7567 tqnvb
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd zjsltthh
+$ ls
+dir twdhlmp
+$ cd twdhlmp
+$ ls
+198813 dnst.cqc
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd zqjbb
+$ ls
+dir czdvd
+94020 dnst
+46041 qtbprrq.pzm
+dir rcfvq
+dir rwj
+118305 vbcpcz
+48725 wlcl.fhs
+$ cd czdvd
+$ ls
+302317 tlf
+$ cd ..
+$ cd rcfvq
+$ ls
+dir cjws
+$ cd cjws
+$ ls
+dir dsgf
+dir fvqbhq
+203941 hgcbcvb
+9562 qqjh.mfh
+32161 qtbprrq.tgn
+225251 sbmpn
+dir sdhvcj
+$ cd dsgf
+$ ls
+dir cbwzg
+141466 ctpszzvn.qrq
+277153 ngmw.clj
+100681 vmdwgrp
+$ cd cbwzg
+$ ls
+dir nblvrbv
+$ cd nblvrbv
+$ ls
+129474 dlcbng.sgf
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd fvqbhq
+$ ls
+75755 fmmhnhtf
+229463 tlh
+$ cd ..
+$ cd sdhvcj
+$ ls
+306751 tqnvb
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd rwj
+$ ls
+130415 cjbz
+283701 rgsdtn
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd mdqplln
+$ ls
+169404 dvss.mvd
+105385 fmmhnhtf
+222834 jhzpwscp.sqg
+164293 jsqlprqn.vnp
+57167 pwpjfq.bmb
+dir qtbprrq
+$ cd qtbprrq
+$ ls
+62823 ljvwzj.flm
+252940 tlh
+$ cd ..
+$ cd ..
+$ cd twdhlmp
+$ ls
+dir dhvgfhc
+dir qrlq
+$ cd dhvgfhc
+$ ls
+dir vpldlp
+$ cd vpldlp
+$ ls
+279067 dnst.jfs
+9050 fmmhnhtf
+88586 mfbj.fgs
+$ cd ..
+$ cd ..
+$ cd qrlq
+$ ls
+dir qwwftl
+$ cd qwwftl
+$ ls
+103153 tnczww
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd zbt
+$ ls
+99657 fsq.rzj
+158138 gbfjfctj.bgg
+260423 tqnvb
+161379 trg
+$ cd ..
+$ cd ..
+$ cd szljjhc
+$ ls
+287080 stnp.lgp
+173682 wjzvglm.lfm
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd vrj
+$ ls
+129084 ngmw.clj
+250696 pdpzzbs
+$ cd ..
+$ cd wrqcfl
+$ ls
+dir bjlwb
+105899 gsvm
+dir jdnjpg
+178665 znnmmhqt.hth
+$ cd bjlwb
+$ ls
+207939 gbhcnts
+$ cd ..
+$ cd jdnjpg
+$ ls
+260418 tqnvb
+302144 twdhlmp.ghg
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd qtbprrq
+$ ls
+95562 fmmhnhtf
+dir plf
+dir qtbprrq
+306396 rqqmm.wvw
+dir wpfj
+$ cd plf
+$ ls
+dir fmftrbn
+20347 twb.zjd
+$ cd fmftrbn
+$ ls
+dir rfznrm
+$ cd rfznrm
+$ ls
+283327 rlzjcg
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd qtbprrq
+$ ls
+313931 ztmhrjc
+$ cd ..
+$ cd wpfj
+$ ls
+3969 wrbhb.jll
+$ cd ..
+$ cd ..
+$ cd vtb
+$ ls
+14260 fmmhnhtf
+dir gbhcnts
+dir lwcznw
+dir mhp
+dir pqcddzsf
+272267 qgh
+301727 rsjrn.wjg
+101787 vqscjb
+dir zvn
+$ cd gbhcnts
+$ ls
+7627 tqnvb
+$ cd ..
+$ cd lwcznw
+$ ls
+98498 dnst.tds
+dir gfh
+dir jdg
+dir llnl
+161511 mtmrr.hvb
+dir ppzwbgnz
+210908 qtbprrq
+dir tvhz
+$ cd gfh
+$ ls
+169547 mjjvvlqj.jmv
+$ cd ..
+$ cd jdg
+$ ls
+dir cthptwcf
+dir ljvwzj
+dir vnlndl
+$ cd cthptwcf
+$ ls
+98711 qwzwz.qct
+$ cd ..
+$ cd ljvwzj
+$ ls
+245473 zhptcmcr.fts
+$ cd ..
+$ cd vnlndl
+$ ls
+151466 ljvwzj
+285091 twdhlmp.mzv
+59067 vcdpbg.nmp
+$ cd ..
+$ cd ..
+$ cd llnl
+$ ls
+141508 phtmjj.qzl
+dir qtbprrq
+105151 tlh
+$ cd qtbprrq
+$ ls
+62020 hdzljht.fvq
+$ cd ..
+$ cd ..
+$ cd ppzwbgnz
+$ ls
+298940 pzdqzrn.zlz
+$ cd ..
+$ cd tvhz
+$ ls
+96628 hrzr
+$ cd ..
+$ cd ..
+$ cd mhp
+$ ls
+226604 mbdn.tbq
+dir ndgqtvhg
+$ cd ndgqtvhg
+$ ls
+55244 dnst
+dir sljbrmhb
+$ cd sljbrmhb
+$ ls
+32711 dnst
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd pqcddzsf
+$ ls
+dir shwrrq
+$ cd shwrrq
+$ ls
+dir dplcwvhg
+dir pvtpf
+dir qpsmgfjl
+247965 rrw.wwv
+dir vmrwpt
+$ cd dplcwvhg
+$ ls
+242534 fmmhnhtf
+202367 fzmt.qrw
+197586 ljvwzj.qgm
+dir stp
+dir zpz
+$ cd stp
+$ ls
+12921 mlcqtthb.jtd
+$ cd ..
+$ cd zpz
+$ ls
+235965 ngmw.clj
+$ cd ..
+$ cd ..
+$ cd pvtpf
+$ ls
+319563 rdspj.slv
+279577 vqpjzrdl.hhj
+$ cd ..
+$ cd qpsmgfjl
+$ ls
+131841 cqhrgc.cqz
+105373 fbnp
+$ cd ..
+$ cd vmrwpt
+$ ls
+176373 phgsdlnj.ggq
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd zvn
+$ ls
+dir gbhcnts
+dir gfh
+dir ppqjzln
+dir qtbprrq
+$ cd gbhcnts
+$ ls
+156292 wlcl.fhs
+$ cd ..
+$ cd gfh
+$ ls
+189836 ljvwzj.wpt
+10416 zbnhzjvw.jct
+$ cd ..
+$ cd ppqjzln
+$ ls
+95088 sszd
+$ cd ..
+$ cd qtbprrq
+$ ls
+295187 hnnl
+292421 qtbprrq.ppg
+220281 wlcl.fhs
\ No newline at end of file
diff --git a/data/day08/example01.txt b/data/day08/example01.txt
new file mode 100644
index 0000000..6557024
--- /dev/null
+++ b/data/day08/example01.txt
@@ -0,0 +1,5 @@
+30373
+25512
+65332
+33549
+35390
\ No newline at end of file
diff --git a/data/day08/input.txt b/data/day08/input.txt
new file mode 100644
index 0000000..451fe1b
--- /dev/null
+++ b/data/day08/input.txt
@@ -0,0 +1,99 @@
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\ No newline at end of file
diff --git a/data/day09/example01.txt b/data/day09/example01.txt
new file mode 100644
index 0000000..cbea2b3
--- /dev/null
+++ b/data/day09/example01.txt
@@ -0,0 +1,8 @@
+R 4
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\ No newline at end of file
diff --git a/data/day09/example02.txt b/data/day09/example02.txt
new file mode 100644
index 0000000..c1eba0a
--- /dev/null
+++ b/data/day09/example02.txt
@@ -0,0 +1,8 @@
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\ No newline at end of file
diff --git a/data/day09/input.txt b/data/day09/input.txt
new file mode 100644
index 0000000..b110a83
--- /dev/null
+++ b/data/day09/input.txt
@@ -0,0 +1,2000 @@
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diff --git a/data/day10/example01.txt b/data/day10/example01.txt
new file mode 100644
index 0000000..94cd0a8
--- /dev/null
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+addx -9
+addx 18
+addx 1
+addx 2
+noop
+noop
+addx 9
+noop
+noop
+noop
+addx -1
+addx 2
+addx -37
+addx 1
+addx 3
+noop
+addx 15
+addx -21
+addx 22
+addx -6
+addx 1
+noop
+addx 2
+addx 1
+noop
+addx -10
+noop
+noop
+addx 20
+addx 1
+addx 2
+addx 2
+addx -6
+addx -11
+noop
+noop
+noop
\ No newline at end of file
diff --git a/data/day10/expected01.txt b/data/day10/expected01.txt
new file mode 100644
index 0000000..ecee815
--- /dev/null
+++ b/data/day10/expected01.txt
@@ -0,0 +1,6 @@
+##  ##  ##  ##  ##  ##  ##  ##  ##  ##  
+###   ###   ###   ###   ###   ###   ### 
+####    ####    ####    ####    ####    
+#####     #####     #####     #####     
+######      ######      ######      ####
+#######       #######       #######     
\ No newline at end of file
diff --git a/data/day10/input.txt b/data/day10/input.txt
new file mode 100644
index 0000000..871fb66
--- /dev/null
+++ b/data/day10/input.txt
@@ -0,0 +1,143 @@
+noop
+addx 26
+addx -21
+addx 2
+addx 3
+noop
+noop
+addx 23
+addx -17
+addx -1
+noop
+noop
+addx 7
+noop
+addx 3
+addx 1
+noop
+noop
+addx 2
+noop
+addx 7
+noop
+addx -12
+addx 13
+addx -38
+addx 5
+addx 34
+addx -2
+addx -29
+addx 2
+addx 5
+addx 2
+addx 3
+addx -2
+addx -1
+addx 8
+addx 2
+addx 6
+addx -26
+addx 23
+addx -26
+addx 33
+addx 2
+addx -37
+addx -1
+addx 1
+noop
+noop
+noop
+addx 5
+addx 5
+addx 3
+addx -2
+addx 2
+addx 5
+addx 5
+noop
+noop
+addx -2
+addx 4
+noop
+noop
+noop
+addx 3
+noop
+noop
+addx 7
+addx -1
+addx -35
+addx -1
+addx 5
+addx 3
+noop
+addx 4
+noop
+noop
+noop
+noop
+noop
+addx 5
+addx 1
+noop
+noop
+noop
+addx -7
+addx 12
+addx 2
+addx 7
+noop
+addx -2
+noop
+noop
+addx 7
+addx 2
+addx -39
+noop
+noop
+addx 5
+addx 2
+addx -4
+addx 25
+addx -18
+addx 7
+noop
+addx -2
+addx 5
+addx 2
+addx 6
+addx -5
+addx 2
+addx -22
+addx 29
+addx -21
+addx -7
+addx 31
+addx 2
+noop
+addx -36
+addx 1
+addx 5
+noop
+addx 1
+addx 4
+addx 5
+noop
+noop
+noop
+addx 3
+noop
+addx -13
+addx 15
+noop
+addx 5
+noop
+addx 1
+noop
+addx 3
+addx 2
+addx 4
+addx 3
+noop
+addx -3
+noop
\ No newline at end of file
diff --git a/data/day11/example01.txt b/data/day11/example01.txt
new file mode 100644
index 0000000..c04eddb
--- /dev/null
+++ b/data/day11/example01.txt
@@ -0,0 +1,27 @@
+Monkey 0:
+  Starting items: 79, 98
+  Operation: new = old * 19
+  Test: divisible by 23
+    If true: throw to monkey 2
+    If false: throw to monkey 3
+
+Monkey 1:
+  Starting items: 54, 65, 75, 74
+  Operation: new = old + 6
+  Test: divisible by 19
+    If true: throw to monkey 2
+    If false: throw to monkey 0
+
+Monkey 2:
+  Starting items: 79, 60, 97
+  Operation: new = old * old
+  Test: divisible by 13
+    If true: throw to monkey 1
+    If false: throw to monkey 3
+
+Monkey 3:
+  Starting items: 74
+  Operation: new = old + 3
+  Test: divisible by 17
+    If true: throw to monkey 0
+    If false: throw to monkey 1
\ No newline at end of file
diff --git a/data/day11/input.txt b/data/day11/input.txt
new file mode 100644
index 0000000..4060600
--- /dev/null
+++ b/data/day11/input.txt
@@ -0,0 +1,55 @@
+Monkey 0:
+  Starting items: 97, 81, 57, 57, 91, 61
+  Operation: new = old * 7
+  Test: divisible by 11
+    If true: throw to monkey 5
+    If false: throw to monkey 6
+
+Monkey 1:
+  Starting items: 88, 62, 68, 90
+  Operation: new = old * 17
+  Test: divisible by 19
+    If true: throw to monkey 4
+    If false: throw to monkey 2
+
+Monkey 2:
+  Starting items: 74, 87
+  Operation: new = old + 2
+  Test: divisible by 5
+    If true: throw to monkey 7
+    If false: throw to monkey 4
+
+Monkey 3:
+  Starting items: 53, 81, 60, 87, 90, 99, 75
+  Operation: new = old + 1
+  Test: divisible by 2
+    If true: throw to monkey 2
+    If false: throw to monkey 1
+
+Monkey 4:
+  Starting items: 57
+  Operation: new = old + 6
+  Test: divisible by 13
+    If true: throw to monkey 7
+    If false: throw to monkey 0
+
+Monkey 5:
+  Starting items: 54, 84, 91, 55, 59, 72, 75, 70
+  Operation: new = old * old
+  Test: divisible by 7
+    If true: throw to monkey 6
+    If false: throw to monkey 3
+
+Monkey 6:
+  Starting items: 95, 79, 79, 68, 78
+  Operation: new = old + 3
+  Test: divisible by 3
+    If true: throw to monkey 1
+    If false: throw to monkey 3
+
+Monkey 7:
+  Starting items: 61, 97, 67
+  Operation: new = old + 4
+  Test: divisible by 17
+    If true: throw to monkey 0
+    If false: throw to monkey 5
\ No newline at end of file
diff --git a/data/day12/example01.txt b/data/day12/example01.txt
new file mode 100644
index 0000000..433e0d2
--- /dev/null
+++ b/data/day12/example01.txt
@@ -0,0 +1,5 @@
+Sabqponm
+abcryxxl
+accszExk
+acctuvwj
+abdefghi
\ No newline at end of file
diff --git a/data/day12/input.txt b/data/day12/input.txt
new file mode 100644
index 0000000..b226042
--- /dev/null
+++ b/data/day12/input.txt
@@ -0,0 +1,41 @@
+abcccaaaaaaccccccccaaaaaccccccaaaaaaccccccaaaaaaaacccaaaaaaaccaaaacccccccccccccccccccccccccaaaaaacccccccccccccccccccccccccccccaaaaaa
+abcccaaaaaacccccccaaaaaaccccaaaaaaaacccccccaaaaaaaaaaaaaaaaccaaaaacccccccccccccccccccccccccaaaaaacccccccccccccccccccccccccccccaaaaaa
+abccccaaaaacaaaccaaaaaaaacccaaaaaaaaacccccccaaaaaaaaaaaaaaaacaaaaaacccccccccaaacccccccccccaaaaaaaaccccccccccaaccccccccccccccccaaaaaa
+abccccaaaaccaaaaaaaaaaaaacccaaaaaaaaaacccccaaaaaaaaaaaaaaaaaaacaaaacccccccccaaaacccccccccaaaaaaaaaacccccccccaaaccccccccccccccccccaaa
+abcccccccccaaaaaacccaacccccccccaaacaaaccccccaacccccccaaaaaaaaacaacccccccccccaaaacccccccccaaaaaaaaaacccccccccaaaccacaaccccccccccccaaa
+abcccccccccaaaaaacccaacccccccccaaacccccccccccccccccccaaaacaaaacccccccaacaaccaaaccccccccccaccaaaaacacccccccccaaaacaaaaccccccccccccaac
+abccccccccccaaaaacccccccccccccccacccaaaacccccccccccccaaaacccccccccccccaaaacccccccccccaacccccaaaaccccccccjjjjaaaaaaaaaccccccccccccccc
+abccccccccccaaaacccccccccccccccccccaaaaacccccccccccccaaaccccccccccccccaaaaacccccccccaaaaaacccaaccccccccjjjjjjkkaaaacccccccccaacccccc
+abcccccaaccccccccccccccccccccccccccaaaaaacccccccccccccaacccccccccccccaaaaaaccccccccccaaaaaccccccccccccjjjjjjjkkkkaacccccaacaaacccccc
+abccaaaacccccccccccccccccccccccccccaaaaaaccccccccccccccccccccccccccccaaaacaccccccccaaaaaaaccccaacccccjjjjoooookkkkkkkklllaaaaaaacccc
+abccaaaaaacccccccccccccccccccccccccaaaaacccccccccccccccccccccccccccccccaaccccccccccaaaaaaaaccaaaaccccjjjoooooookkkkkkkllllaaaaaacccc
+abcccaaaaacccccccccccccccccccccccccccaaaccccccccaaaacccccccccccccccccccccccccccccccaaaaaaaaccaaaaccccjjooooooooppkkppplllllaccaacccc
+abccaaaaaccccccccccccaccccccccccccccccccccccccccaaaacccccccccccccccccccccccccccccccccaaacacccaaaacccijjooouuuuoppppppppplllccccccccc
+abcccccaacccccccccccaaaaaaaaccccccccccccccccccccaaaaccccaaccccccccaaacccccccccccccaacaaccccccccccccciijoouuuuuuppppppppplllcccaccccc
+abcccccccccccccccccccaaaaaaccccccccccccccccccccccaaccccaaaacccccccaaaaccccccccccaaaaaaccccccccccccciiiiootuuuuuupuuuvvpppllccccccccc
+abcccccccccccccccccccaaaaaaccaaaaacccccccccccccccccccccaaaacccccccaaaaccccccccccaaaaaaccccccccccccciiinnotuuxxxuuuuvvvpppllccccccccc
+abccccccccccccccacccaaaaaaaacaaaaaaacccccccccccccccccccaaaacccccccaaacccccaaaaccaaaaaccccaaccccccciiiinnnttxxxxuuyyyvvqqqllccccccccc
+abcccccccccccaaaaccaaaaaaaaaaaaaaaaaaccaacccccccccccccccccccccccccccccccccaaaacccaaaaaccaaacccccciiinnnnnttxxxxxyyyyvvqqqllccccccccc
+abaaaacccccccaaaaaaaaaaaaaaaaaaaaaaaaaaaacccccccccccccccccccccccccccccccccaaaacccaaaaaacaaaccccciiinnnnttttxxxxxyyyyvvqqmmmccccccccc
+abaaaaccccccccaaaaacccaaaaacaaaaaacaaaaaaccccccccccccccccaaccccccccccccccccaacccccccaaaaaaaaaaciiinnnnttttxxxxxyyyyvvqqqmmmccccccccc
+SbaaaacccccccaaaaaccccaaaaaccaaaaaaaaaaaccccccccccccccccaaacaacccccccccccccccccccccccaaaaaaaaachhhnnntttxxxEzzzzyyvvvqqqmmmccccccccc
+abaaaacccccccaacaacccccaaaaaaaacaaaaaaaaaccccccccccccccccaaaaaccccccccccccccccccccccccaaaaaaacchhhnnntttxxxxxyyyyyyvvvqqmmmdddcccccc
+abaaaacccccccccccccccccccaaaaaacaaaaaaaaaacccccccccccccaaaaaaccccccccaaaccccccccccccccaaaaaaccchhhnnntttxxxxywyyyyyyvvvqqmmmdddccccc
+abaacccccccccccccccccccaaaaaaacccccaaaaaaacccccccccccccaaaaaaaacccccaaaacccccccccccccaaaaaaacaahhhmmmttttxxwwyyyyyyyvvvqqmmmdddccccc
+abcccccccccccccccccccccaaaaaaacaaccaaacccccccccccccccccaacaaaaacccccaaaacccccccccccccaaacaaaaaahhhmmmmtsssswwyywwwwvvvvqqqmmdddccccc
+abcccccccccccccccaaaccccaaaaaaaaaacaaccaaccccccccccccccccaaacaccccccaaaacccccccccccccccccaaaaacahhhmmmmmsssswwywwwwwvvrrqqmmdddccccc
+abcccccccccccccaaaaaaccccaaaaaaaaaccaaaacccccccccccccccccaacccccccccccccccccccccccaaaccccaaaaaaahhhhhmmmmssswwwwwrrrrrrrrmmmmddccccc
+abcccccccccccccaaaaaaccccaaaaaaaaaaaaaaaaaccccccccccccccccccccccccccccccccccccccaaaaaacccccaaaaachhhhhmmmmsswwwwrrrrrrrrrkkmdddccccc
+abccccccccccccccaaaaaccccccaaaaaaaaaaaaaaaccccccccccccccccccccccccccccccccccccccaaaaaaccccaaaaacccchhggmmmssswwrrrrrkkkkkkkkdddacccc
+abccaaaacccccccaaaaacccccccccaaaaaacaaaaacccccccccccccccccccccccccccccccccccccccaaaaaaccccaacaaaccccggggmmsssssrrlkkkkkkkkkdddaccccc
+abccaaaacccccccaaaaacccccccccaaaaaaccccaacccccccccccccccccccccccccccccccccccccccaaaaaccccccccaaccccccgggmllssssrllkkkkkkkeeeddaccccc
+abccaaaacccccccaaacccccccccccaaaaaacccccccccccccccccccaacccccccccccccccccccccccaaaaaacccccccccccccccccggllllssslllkkeeeeeeeeeaaacccc
+abcccaaccccccccaaacaaaccccccaaaaaaaaaaacccccccccccccaaaaaacccccccccccccccccccccaaacaaacccccaacccccccccggglllllllllfeeeeeeeeaaaaacccc
+abccccccccccaaaaaaaaaaccccccccccccaccaaaccacccccccccaaaaaaccccaaccaacccaaccccccaaaaaaacccccaaccccccccccggglllllllfffeeecccaaaaaacccc
+abccccccccccaaaaaaaaacccccccccccccccaaaaaaaccccccccccaaaaaccccaaaaaacccaaaaaaccaaaaaacccaaaaaaaacccccccggggllllfffffccccccaacccccccc
+abcccccccccccaaaaaaacccccccccccccccccaaaaaaccaacccccaaaaaccccccaaaaacccaaaaaacaaaaaaacccaaaaaaaaccccccccgggffffffffccccccccccccccccc
+abccccccccccccaaaaaaacccccccccccccaaaaaaaaacaaaaccccaaaaacaaaaaaaaaacaaaaaaacaaaaaaaaaccccaaaacccccccccccggffffffacccccccccccccccaaa
+abccccccccccccaaaaaaacaaccccccccccaaaaaaaaacaaaacccccaaaaaaaaaaaaaaaaaaaaaaacaaaaaaaaaacccaaaaacccccccccccaffffaaaaccccccccccccccaaa
+abccccccccccccaaacaaaaaacccccccccccaaaaaaaacaaaaaaaaaaaaaaaaaaaaaaaaacaaaaaaacccaaacaaaccaaaaaacccccccccccccccccaaaccccccccccccccaaa
+abccccccccccccaaccaaaaaccccccccccccccaaaaaaaccccaaaaaaaaaaaaccccaacccccaaaaaacccaaaccccccaaccaacccccccccccccccccaaacccccccccccaaaaaa
+abcccccccccccccccaaaaaaaaccccccccccccaacccacccccccaaaaaaaaaaccccaacccccaaccccccccaccccccccccccccccccccccccccccccccccccccccccccaaaaaa
\ No newline at end of file
diff --git a/data/day13/example01.txt b/data/day13/example01.txt
new file mode 100644
index 0000000..27c8912
--- /dev/null
+++ b/data/day13/example01.txt
@@ -0,0 +1,23 @@
+[1,1,3,1,1]
+[1,1,5,1,1]
+
+[[1],[2,3,4]]
+[[1],4]
+
+[9]
+[[8,7,6]]
+
+[[4,4],4,4]
+[[4,4],4,4,4]
+
+[7,7,7,7]
+[7,7,7]
+
+[]
+[3]
+
+[[[]]]
+[[]]
+
+[1,[2,[3,[4,[5,6,7]]]],8,9]
+[1,[2,[3,[4,[5,6,0]]]],8,9]
\ No newline at end of file
diff --git a/data/day13/input.txt b/data/day13/input.txt
new file mode 100644
index 0000000..3624788
--- /dev/null
+++ b/data/day13/input.txt
@@ -0,0 +1,449 @@
+[[1,4,7,4,8],[],[8,0,7,[],[]]]
+[[10,[5,[0,2,5,3,3],[9,7,9],6],7,9,[2,9,[],4,0]],[8]]
+
+[[7],[7],[[[3,4,6],1,[1,2,4],[7,5,3,5,2]],[[1,3,2,7],10,[9,9,0,2]],[9],[1,[10,4,7],[5,2,1],[10,9,4,3]],[7,[8,9,9,4],[]]],[],[]]
+[[8,[[]],[7,3],4],[[[2,3]],10,[[4],[3,9,4],[0,6,5],1,3]],[],[]]
+
+[[5],[[[],[8,0,4],1],[],2,6,10]]
+[[[[3,0],[7,10,9]],[9,4,3]]]
+
+[[2,10,[1,[],5],[[1],[3,0,9,7,2],[6]],[[],[7,0,2]]],[[[0,10]]]]
+[[3,[[],[5,0,2],2],7,[[0,2,9],2,[4]]],[3,[[4,5]],[[10,2,5,1],[1],9,[3,3,7,7,10],9]],[]]
+
+[[[[],9,7,[2,8,2,1],[6,3,7,6]],8]]
+[[[[9,8,2],[10],[9,0,3],0,[3,5,0]]],[]]
+
+[[[9,10,[1,0,6],[1,2]],[[],[9,5,3],[7,3,10,1],0,0],5,10,[]],[]]
+[[5,6,1,6],[8,6,5,[7,0,5,[0,4,3,6,6],[8,7,8,5]]],[[[1,2],9,1],10,4,3,[5,[5,10,9,9],7,0,[2,3]]],[[[1,5],[0],0],3,[[]]]]
+
+[[0,[[4,6,4,8]],3,[10]],[],[6,8,6],[8,[3,[7,7,10,6,5]],[0,8,[7],[],5]],[1,[3,[4,4,8,3,8],3,[1,9,8,3,10],[0,5,8]]]]
+[[0,[],10]]
+
+[[[[2,4],[5],10,1],[3,6,3],8,0,9],[9,1,9],[[[1],[2,0,7],[10,2],6,[10,9]],[[10],[1,0,3],5,[1,7],[]],3]]
+[[9,6,3],[[6,[8,10,3],2,[6,1],10],1],[]]
+
+[[8,[],[10]],[]]
+[[[[8,5,6,6,5],1,[10]],[]],[],[],[7],[2,2]]
+
+[[9,3]]
+[[0,[1],6,[10,0,6],7],[7,[1,[4,3,10],[],[6,6]],5,[9],7],[7,[[6,2,7,2,5],9,8,7,[9]]],[5]]
+
+[[9,9,[[10]],[8,[7]]],[8,5,7,[[6,1,8],[9,5],[],10,8],[8,[10],[],[5,3,2]]]]
+[[[9,9,6],1,0,9,[[0],[8],2,0]],[[9,5],[[],[9]],3,[[0],9,3,0,8],10],[[[4],[8,2],[2,0,3]],3,6,[[3,8]],4]]
+
+[[4,3,[[10,8,3,1,10],[9]]]]
+[[[6,[0],[3,4],[0]],[],[6,2,[],1],[[],1,[1,4,3,7],9,4]],[0,[[0],[9,2]],1]]
+
+[[[[8,4],[7,8,6,10,1],[]],[[2,8,10,4,5],[0,8],7,[1,5],4],8,[1]],[],[]]
+[[3,[4,[3,3,4]]],[[],1,9,[0]],[[],[[6,9,1],[10,2,3,2,8],3],3,5]]
+
+[[[[0,3,7],3,[4,0],[6,2,0],4],1,[[3,4,7],8,[1]],2]]
+[[0,6,[[6,9,6],9,[0],[2,10]],4]]
+
+[[2,[],6,[[8,10],7,7]],[[[1,2,3,8,3]]],[]]
+[[[],9,9],[9],[[2,4,8,[7]],[1],1,9]]
+
+[[1],[[[],[6,7,6,8],0,[2,3]]]]
+[[[[9,7,2]],3,[8],7,[[3,6,10]]],[[],10]]
+
+[[3,6,[5]],[5]]
+[[],[0,[[6,2],[]],3,4,[[6,1,6,10],8,[5,8],5]],[1,4],[[[8]]],[4,3,[[7,2],9,[],3,3],[5,0,[9,0],10],[[7,8,2],3,3,3]]]
+
+[[[7,[]],[]]]
+[[[[0,1,2],[3,7,6,5,9],8],[7]],[[[8,6,3,6,2],[7,0,2,5,3],[1,2,1],8]],[7,[2,[0,0,4],[4,1,8],5,[7]],4,2,5]]
+
+[[9,1,10,[[5],[],[2,1,4],5,0]],[10,[2,9,1],[10,[0,4],9,4],9],[[4,3,6,[0,3,10,6]],[4,[2]],9],[],[]]
+[[6,[4,[2]],[],10],[[[1,1,5],[5,6,6],7],[2],[[10],[],10],[[3,3],1,5,[1,1,9,4,3]],0],[8,[],[[]],10,1],[1,[],[[7,4,2],1,0,9],2],[[0,9],[[2],9,[9,1,8]],1,[4,1,9,[3]],3]]
+
+[[[3,[],[9,7]],[[3,0,2,6],2,[0,9,1],[6],[7,4,0,7]],[3,[],[10,1,6,2],0],5,3],[3,[]],[],[2,[[],10,4],[6,[5]]],[]]
+[[],[],[[7,[1,1],4,7,[6]],[4],[7,3,6,[4,9,8,3],7],[4,8]]]
+
+[[4,3,8,2,6],[[[8,1]]],[[6,3],[3],[8,[7,7,4,2]]],[8,[6,[10,10,3],0,8],[],7,[10]],[8,0,7,4]]
+[[5,10],[],[6],[]]
+
+[[2,6]]
+[[1,7]]
+
+[[4,0,[[],[2,6,3],10]],[[],[1]]]
+[[3,10,2],[[10,[7],[7],5],[[0,4],[9,1,8,8]],1,[9],1]]
+
+[[3],[[[2,1,5,0]],8,7,[[5,7]],[[],2,8]],[[9,[3,5,2,8]],[[4,7,9],[8,7,4]],[3,10],3,7],[[]]]
+[[5,[],3],[8,[[2,8,10],[],9,[7,9,7],[3,10,4,1,10]],6],[]]
+
+[7,7,4,8,0]
+[7,7,4,8]
+
+[[],[5],[4,0,[[1]],[[],[0,1,0],[8]],[[9,8],6,[],[8,8,6,1,4]]]]
+[[],[0,[]]]
+
+[[[],10],[[[2,7,7,0],[5,5,1,8],0,[]]],[[[5,6,4],0,3,[10,3,2,10,2]],7,9,4,6],[[[],[6],[3,7,4,6,3],4,7]],[4,[]]]
+[[8]]
+
+[[],[],[[10,[0,7],9,[3,6],[]]],[5,[1,2,[1],[9,2,3,4]],[[6,7,7,1,10],7],[8],[[10,8],[2,3,5,2,5],[9,9,9,10,7],[8,2]]]]
+[[7],[],[[[1],9,10,[9,1,1,4],6]],[[[7,4],0,[10,1],9],0,[[],[1,6,6],[]]],[]]
+
+[[],[10,3,1],[[[9,5,10,10,5],[4,1],5,6,10],0]]
+[[4,[[8,9,0],0,[0,10,2,4],7,5],[8,2,3,5],0],[],[3,[[0,1,2,10]]],[6,[],[[],0,3,[4,4,4,3,4]],0],[[[5],5,3],[[],[3],4,0,[3,3,6]],4,[0,6,[]],[5,5,7]]]
+
+[[[],4,[1,0,0,7],10],[],[],[7,[8,[4,0,10]],[[4,5,4,7],6,8,1,[7,10]]],[[[3,6,0],1,8,2],[],10,0,1]]
+[[4,7,5],[6,[[0,9],[1]],[[2],[8,1,2]],8,[9,[7],7,1,[7,0,6,4]]]]
+
+[[6,[[6,10,4,3,8],5]],[],[[[8,9,6],[5,9,8,4,4],[3,10,3]],10,9],[[8,3,[6,2,5,1],[1,7,1]],[5,[3,8,3],[2,3,7,5],8],[[7,5,2],[5],[4,1,10],9]],[5,1,7]]
+[[],[5,[6,[4,0,8,10,0],[9,6]]],[[],6,[[3]]],[]]
+
+[[2,[]]]
+[[[]]]
+
+[[[8,[3,9,1,0,2],[],[1,10,9,10],[1,10,3,2,7]],6,[[8,9,0],[8,1],4]],[[5,[],[3,2,3,2,2]],[],[0,[10],7,3],5],[[10]]]
+[[0,10,[3,3,7,[1,1,5],5],1],[[1,5,5,7,6],[],[],7],[],[1,[9,8,[4],2]],[[],[0,0,[3],[1]],[5,[9,10,1,1],8,1]]]
+
+[[10,0,3],[2],[1],[[[9,9,3,10]],[],2]]
+[[[0,3,[9,1,1,5],6,[]],[8,10,5,1,[8,2,4,0,8]],[[4,9,7,7,4],[7,7,7,5,5],7],[[],[2,10,4,6,2],[6],[6,4,2,2]],2]]
+
+[[[[9,1,2,6,9],[8,4,5]],0]]
+[[9,[[6],[],2,7,0],1,[[8,0,9],[5,1,1],10,8]],[3,[[10,3,7,0,1]]],[1,[[],2,3,[5,5],0],[[8,6,1,9,2],10,[],4]],[]]
+
+[[0,3,6,4]]
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+[[2,8],[7,3],[[1,[6,2],7],5],[[6,[1,10,4],[0,5],[4,5]],10,10],[]]
+
+[[2],[[[],[],[0,8,6,2,1],6,[5]],[[1,4,5,5,7],1,2],1]]
+[[],[[[8,5,9,8,7],5,[7,7,10]]],[8]]
+
+[[[],7],[[[9,10,6,6],[6,10,1,9,4]],[1,9,0,[0,4,10],10],4],[[[5,7],6,3,6],[[9],[2,3,5],0],2],[[[10,10]],[0,[8],[6,6],5],[[8,8],5,7],[8],2],[9,9,[[]]]]
+[[[8],[[9,0,6,6,5],8],[4,[7],[4,6,6],[3,3],10],8,[]],[[[8,2]]],[9,4,[[4]],[[1,5],[0],[1,6,1],[]],0],[0,3,9,[6,7,1,0,[]]]]
+
+[[3,[],[[1],[4],7,[1,2,0,6,5],[5]],6],[4,9,1,1],[5,[[4,2]],[]],[2],[8,2]]
+[[[8,[7,9,8,0,4],[2,3,3],[],[9,5,6]],3,[2,[2,1,3,10,10],9,[4,9,2,2],8],2],[3,0,0,5,[4,[2,1],6,[2,3,9,1,8]]],[9,0,7],[8,5,1,[],9]]
+
+[[],[[[2],[0,4],6],4,[[1,8],8]],[[],10]]
+[[[],[5],10,[[10,5,0,7],[],1,[],7]],[3,[]],[],[2,[[8],9],[3,0,1],[[3,5],[9,2]]],[]]
+
+[[5,[[10],6,[3]],7],[3,10,[1]],[[[7,6,8,8,10],[5,5,2],[7,1,2],[]]],[3,9,[0,3]],[7]]
+[[2,[[6]],10,[9,[8],[],[1,10,4,4,9],[5]],[8]],[10],[],[3,[10,3],2,[[4,10,5,6,7],[5,7,7],6]],[10,7]]
+
+[[[[],[5,2,9],10]],[[6,[],[2,0]],[[0,9,0],7,[]],[[9,3]],[]]]
+[[10,[[1,1,8],7,3],[[8,6,10],4,0],9,6],[],[7,[],[3,[9,1,5],[10,4,1,8,1],0],[[3,2,1],4],[[8,10]]]]
+
+[[],[],[[[10,3,7,10]],0,0,6,[[6,3,4,8]]],[9,[[],[2,10]]],[[8,[],[3,10,5,8,10],6,[9,6]],6]]
+[[[],[9,3,[10,7],[6],7],[[6,10,10],[3],[10,7,0,5,0],7],6],[[[7,9,4,9,4],3,7,[7,1,7,4]],8,[9,7,[6,2,3,9,1]]],[4,[],3]]
+
+[[5,5,9],[[5,[8,9,7,2],[5,7],[5,1,4,3,4],4],[0,[],3],1,3,3],[5,5],[[2,[2,9,4],[1,3,4],[5,6,9],[1,2]],9]]
+[[[[8,6,9,9]],[[8,3,7,9],[10,1,0,3],8,[0,3,10,7]],[4,5,[3,4,3,2,6]],[[10]],9],[[[]],2],[8,10]]
+
+[[[0,1,[7]],8,[[3],4,0],[[]]],[[0,1],[[5],10,1,[4,6,0,10,0],[5,6,10,10]],4,[1,[1,8],[4,9,9,10,5]],[8,3,1,[],9]],[6],[[],[[2],9,[7,1,6,5],[9],[10,9]]],[[[0],[9,3]],[2,5,[8,1,7],[]],[],[],5]]
+[[2,[[4,3,5,5,2],4,[9,6],2,9],9,[3,2]],[[]],[[[10,9],[2],10,4,4],3,[[3,7,3],[0,2,1,9,0]],[9,6,5]]]
+
+[[],[[[8,7,10],6,[3,8],5],[2,1,[1,5,4,3]],9,[[],[],[8,3],6,[10]],2],[2,0,[[],3,2,5,[0,7,8]]],[[[5,5,6],[1,9],[6],[10],7],8,[[8,7,3],0]]]
+[[8,[],5,0],[],[10,[[],9,4,[7]],[]],[9],[4,10,0]]
+
+[[5,9],[[[10,8,5,6],5,9,7,[]],[],[0]],[[1,4]],[[[5,9,4,1],[10,7,5,9],[6],0,7],[4,8],4,10,4],[6,9,[8],1]]
+[[],[9,6,[6],7,0],[6]]
+
+[[3,1,3,5,[]]]
+[[3,[[0,8,2,10,3],[5,1,3,4,0],10,9],0,6,1],[6],[0,3,8,[2,7]],[10,2,5,[7,10],[2,3,[],[2]]]]
+
+[[3,8,5,[7,[5,2],4],[3]],[[1,[1,0,5,1],7],4],[[8],[[1,5,9,0,9],2,[]],7,[[4],[7],[0,10,2,5,5],8],[10,[1]]],[[10],[7,[5],5,[4,3,9],[]]]]
+[[],[[6],[2]],[[2,[1,9],[8,3],1],10,0],[[10,1,[5],7,2],[4,3],[[6,4,9,1,4]]],[[5,[2,6,9],[4,7,9,6,3],[1,6,0,6,0]]]]
+
+[[[[0],7,[0]],[],[10,3,[5,9],6,[2,7,10]]],[],[[[5,7,3,3],[3]],0,[7,9],[7,4,[9],8,8],[7]],[10,7,10,0,5]]
+[[[],[],[[],8,0,[8]],0,[]],[6,3,9,5,9],[],[[],7,7,[4],[[0],[6,3,6,0,9],9]]]
+
+[[5,2,[[8,0,0],8,8]]]
+[[6],[[4,[9,4],[3,1]],[6,2,0,[3]],0,7]]
+
+[[],[[],[]],[],[10,[],[[7,4,1,3,5],9,0],[],7],[]]
+[[[8,7]],[1,[0,[9],2,[]],9],[[[10,3,9,5,8],[],[]],7,[9,[3,0,3,8,9]],[[2,1],[7,2,0,2,9]]],[]]
+
+[[[],[[7,7],[4]],6,[[],7],[]],[[[3,0,0,1],[1,9,10,4,10]],2,[10,[],[5,0],3],1,[[7,6,2],5,10,0,[7,8]]],[]]
+[[[1,[2,0,9,0,8]],[[],1,0],6,[5]],[[],10,[8,[1,2]],[]]]
+
+[[2,7,[[3,4,4,2],1,[9],5,3],[[2],8,[3,7,5],9]],[7],[[3,4,[],[]]],[4,[],5,[10,5,[4,4,5,0],1]]]
+[[[0],2,7],[]]
+
+[[2],[[2,7],5,[[9],10,0],[[1,5,2,7],3,10,6,[6]],[[2,0,9,4],6]],[[[10,8,7,4,9],[10],[5,1,4],9],[[10,3,10],[],[5,9,9],[10,3,2,5,9]],[[0,7,3,10],8,3,[9,7],[3,4,9,8]],7],[[1,10,6,0],5,6]]
+[[[]],[[0,2,[4,1,9]],[],5,[[10,4,5,4,2],[10,3,0,1,3]]],[3,0]]
+
+[[8,4,4,[[],[7,9,2,8],8,6],8],[[[9],[10]],[[5,7,5],[],[4,6,0,5,5]]]]
+[[2,[[6,6,0,2,5],6,[7,1,7,9],7],[[9,3],5,[9,2,7],[9,8,3],0],2],[[[3,8,3],[3,1,5],[0,0,0,6],[5,5,4,1],[3]],[0],6,[0,[]]]]
+
+[[2,[3],[]],[2,[[10,4,6,10,5],3,4,8]],[[[],5,1,10],[9,[8,0,2,5],9,8,[6,10,5,9,1]],[3]]]
+[[4,[[7,10],9],[7,1]],[[[8],1,9,[1,10,5]],[[9]],[[4,1,3]],10,[4,2,[9],[7,8,2,1,1],5]],[[[],0,6,2],[2,[],1,[2,9,0,8,7]],[[8]],4],[[[6,3],[],5,8,[10,3,5]],6,0,6],[[[1,1,0],0,[10]]]]
+
+[[3,[[1,1,9],9,[6],8,4],[]]]
+[[],[6,[7,1],[6,10,[0,2,1,3],[],[8,4]],10,2],[[[6,10]],8,6,[10,[0,2,3],1]],[0,5,4,6,[]]]
+
+[[9,[[1,8,3,2],[3],[8,2,9,3],[6,8,7]]]]
+[[],[6,[[10,1,9]]],[10],[6,[[4]],[[2,8,10],[5,10],[2,8,3]],0],[7,5,1,[[7,10,3,1,9]],[[0,1,0,0,3],[]]]]
+
+[[1,7],[0,[],2]]
+[[[[2,0,0,5,1],3,[5,6]]]]
+
+[[8,[[0,8],2,3],10,[[6,5,0,1,6],10,8,[10,4,5]],5],[1,4,2,6,[[9,7,10,7,9],2,5]],[5,[[6,0,4,8]],7,[[2,3,2,7]]],[[4,[],7,7,5],[[],10,[],8],[[1,6,5],2,0,8,[]],[[0,9,7,1,3],9,[7,2,9,8]],[[],[1,7],2,2]],[1,8]]
+[[10,[]],[9,[]],[[4,[4],3],7,[[4,2,4],10]],[[5,[5,5,4,3],4,6,[6]],9,[[5,8,7,4,6],[],10,2,[1]]],[]]
+
+[[6,9],[0,2,[[9],0,[8,10,9,7]],7,[4,4,2,[]]],[[9],[7,[8,4],[8,2],0],[[4,2],[5],[4,6],[0,6]],[5]],[[[9,2],8,[0],9,[1,9,4]],[[7,0,2,5,5],1,[6,8,2],6,7]],[[10],9,3,5,[]]]
+[[[[4],0],[],[5,9,[9,3,4,9,7],8],3,9],[7,8,2,3,0],[4,[5,[7,2,3,9],6,[0,4,0,3],8]]]
+
+[[[[2,4,0,1],[2,10,7,6,1],7,[7,1,10],7],[],[[8],1,[9,6,5,2],4,[4]]],[[4,1,[5,9,7],[4],6],4,3,[[8,2,8,8,9],[7,0,10]]],[[]],[[],[[0,0,1,3],5],9],[1]]
+[[[[]],[9],[[6,5,0,0],[8,8,9,2],[10,10,10,8,2],[7,2,4,0,0]]],[8,[3,[6,1,5,7,4],5,0,4],3]]
+
+[[4,[]],[9,2,[0],[3,2,[2,6,7,5,6]]],[[[3],[],[4,5,9,0,2],[5,3,0,1],[2,7,7]],10,9,3,[[3,4,6,8,10],3,1,2]],[]]
+[[[8,[3,2,2],10,10,[8,7,8]],[[7,2,2],[1,8,2,7],[0,2,1,2,7]],[8],7],[10,0]]
+
+[[[[6,6,3,4,0],5],[6,7,9],5,[[4,9,1],[9,2],0,6],[7]],[7]]
+[[[0]]]
+
+[[[],8,[]],[1],[]]
+[[6,[]],[3,4],[[7,[9],3,4,7],[10,[3,10],0,3,[1,9]],[0,5,[6,3,6,7],2,9]]]
+
+[7,6,8,6]
+[7,6,8,6,4]
+
+[[[5,[10],[6,2,2],3],7,[],[],7],[[2,[7,5,3],1,7,10],6,[[],4,9],[6,[4,8]],1],[],[[[2,4,3,6,3],[0,10,8],[2,2,7]],6,[[5,7],2,5,10],[9,[0,8,0,9,7]]]]
+[[10],[3,[[3,5,5],[5,2,10],[2,9,10],[1,3,3,0,7],1],[[7,2,4,3],1,[0,8]]],[5,0,[[3],5,8],[[],9,[4,10,1],7]]]
+
+[[9,[[],1,1,4],[10,4,[5,3,1,6],10,[]],0,0],[8,7,4],[6,[3,[9,9,6,3,3],[10,0]],[[],4,[10,0,9],1]],[[4,[6,3],[0,10,8,5,5],1,7],[[]],2,3,1]]
+[[[3,[3,8],[4,9,3,8,1]]],[],[[3,[],[4,3,9],8],4,1,2,2],[],[[[5,3,8,7]]]]
+
+[[[[8,9,3,6,4],[9,10,3],[],6],[4,1,[0,2,3]],4,[[9,6],10,9,0]],[[[9,8,1,0],[8,9,5,4,6]]],[[]],[[3],6,[2,6,8,[2,1,3,3,6],[4,7,5,1]]],[2]]
+[[],[10],[[4],10,[8]]]
+
+[[3,[[9,9],[4,4,5,8,3],0,4],9,[[1,9,0],4,1,0,8]]]
+[[2,2,[6,4],[],7],[0],[10,8]]
+
+[[[[]],6,[[3,8,6,3,9]],9,6],[5,[[0,9,8,7],1,8],9,7],[4,[2,[4,8,3,6]],5,[0,8,[3,9,6,3,10]],7]]
+[[0,[],8]]
+
+[[[[6,8],[10,1,5,1,5]],[[]],[[4,0,10,6],4,[10,5,1],9],[10],[10,[],[10,2],[10,4,3,7],[3]]],[10,2,[10,[],8],[8,[1,5,0,7,5],[],[4,9,10]],9]]
+[[[],10,[],8,10],[[[],7,0,[10,0,1,10,4]],5],[8,[4,3],[[10,10,9,1],[3,0,6]],4],[[]],[]]
\ No newline at end of file
diff --git a/data/day14/example01.txt b/data/day14/example01.txt
new file mode 100644
index 0000000..1926028
--- /dev/null
+++ b/data/day14/example01.txt
@@ -0,0 +1,2 @@
+498,4 -> 498,6 -> 496,6
+503,4 -> 502,4 -> 502,9 -> 494,9
\ No newline at end of file
diff --git a/data/day14/input.txt b/data/day14/input.txt
new file mode 100644
index 0000000..880a895
--- /dev/null
+++ b/data/day14/input.txt
@@ -0,0 +1,179 @@
+496,35 -> 496,29 -> 496,35 -> 498,35 -> 498,26 -> 498,35 -> 500,35 -> 500,25 -> 500,35 -> 502,35 -> 502,34 -> 502,35 -> 504,35 -> 504,31 -> 504,35 -> 506,35 -> 506,33 -> 506,35 -> 508,35 -> 508,25 -> 508,35
+501,48 -> 501,44 -> 501,48 -> 503,48 -> 503,39 -> 503,48 -> 505,48 -> 505,39 -> 505,48 -> 507,48 -> 507,41 -> 507,48 -> 509,48 -> 509,41 -> 509,48 -> 511,48 -> 511,47 -> 511,48 -> 513,48 -> 513,47 -> 513,48 -> 515,48 -> 515,43 -> 515,48
+551,158 -> 551,154 -> 551,158 -> 553,158 -> 553,156 -> 553,158 -> 555,158 -> 555,152 -> 555,158 -> 557,158 -> 557,149 -> 557,158 -> 559,158 -> 559,156 -> 559,158 -> 561,158 -> 561,152 -> 561,158 -> 563,158 -> 563,155 -> 563,158 -> 565,158 -> 565,153 -> 565,158 -> 567,158 -> 567,155 -> 567,158 -> 569,158 -> 569,149 -> 569,158
+568,139 -> 573,139
+496,35 -> 496,29 -> 496,35 -> 498,35 -> 498,26 -> 498,35 -> 500,35 -> 500,25 -> 500,35 -> 502,35 -> 502,34 -> 502,35 -> 504,35 -> 504,31 -> 504,35 -> 506,35 -> 506,33 -> 506,35 -> 508,35 -> 508,25 -> 508,35
+517,81 -> 517,84 -> 509,84 -> 509,92 -> 524,92 -> 524,84 -> 522,84 -> 522,81
+501,48 -> 501,44 -> 501,48 -> 503,48 -> 503,39 -> 503,48 -> 505,48 -> 505,39 -> 505,48 -> 507,48 -> 507,41 -> 507,48 -> 509,48 -> 509,41 -> 509,48 -> 511,48 -> 511,47 -> 511,48 -> 513,48 -> 513,47 -> 513,48 -> 515,48 -> 515,43 -> 515,48
+496,35 -> 496,29 -> 496,35 -> 498,35 -> 498,26 -> 498,35 -> 500,35 -> 500,25 -> 500,35 -> 502,35 -> 502,34 -> 502,35 -> 504,35 -> 504,31 -> 504,35 -> 506,35 -> 506,33 -> 506,35 -> 508,35 -> 508,25 -> 508,35
+501,48 -> 501,44 -> 501,48 -> 503,48 -> 503,39 -> 503,48 -> 505,48 -> 505,39 -> 505,48 -> 507,48 -> 507,41 -> 507,48 -> 509,48 -> 509,41 -> 509,48 -> 511,48 -> 511,47 -> 511,48 -> 513,48 -> 513,47 -> 513,48 -> 515,48 -> 515,43 -> 515,48
+531,98 -> 531,102 -> 526,102 -> 526,109 -> 540,109 -> 540,102 -> 535,102 -> 535,98
+551,158 -> 551,154 -> 551,158 -> 553,158 -> 553,156 -> 553,158 -> 555,158 -> 555,152 -> 555,158 -> 557,158 -> 557,149 -> 557,158 -> 559,158 -> 559,156 -> 559,158 -> 561,158 -> 561,152 -> 561,158 -> 563,158 -> 563,155 -> 563,158 -> 565,158 -> 565,153 -> 565,158 -> 567,158 -> 567,155 -> 567,158 -> 569,158 -> 569,149 -> 569,158
+561,171 -> 561,162 -> 561,171 -> 563,171 -> 563,168 -> 563,171 -> 565,171 -> 565,163 -> 565,171 -> 567,171 -> 567,163 -> 567,171 -> 569,171 -> 569,161 -> 569,171 -> 571,171 -> 571,170 -> 571,171 -> 573,171 -> 573,166 -> 573,171 -> 575,171 -> 575,161 -> 575,171 -> 577,171 -> 577,165 -> 577,171
+501,48 -> 501,44 -> 501,48 -> 503,48 -> 503,39 -> 503,48 -> 505,48 -> 505,39 -> 505,48 -> 507,48 -> 507,41 -> 507,48 -> 509,48 -> 509,41 -> 509,48 -> 511,48 -> 511,47 -> 511,48 -> 513,48 -> 513,47 -> 513,48 -> 515,48 -> 515,43 -> 515,48
+501,48 -> 501,44 -> 501,48 -> 503,48 -> 503,39 -> 503,48 -> 505,48 -> 505,39 -> 505,48 -> 507,48 -> 507,41 -> 507,48 -> 509,48 -> 509,41 -> 509,48 -> 511,48 -> 511,47 -> 511,48 -> 513,48 -> 513,47 -> 513,48 -> 515,48 -> 515,43 -> 515,48
+534,78 -> 539,78
+513,78 -> 518,78
+561,171 -> 561,162 -> 561,171 -> 563,171 -> 563,168 -> 563,171 -> 565,171 -> 565,163 -> 565,171 -> 567,171 -> 567,163 -> 567,171 -> 569,171 -> 569,161 -> 569,171 -> 571,171 -> 571,170 -> 571,171 -> 573,171 -> 573,166 -> 573,171 -> 575,171 -> 575,161 -> 575,171 -> 577,171 -> 577,165 -> 577,171
+561,171 -> 561,162 -> 561,171 -> 563,171 -> 563,168 -> 563,171 -> 565,171 -> 565,163 -> 565,171 -> 567,171 -> 567,163 -> 567,171 -> 569,171 -> 569,161 -> 569,171 -> 571,171 -> 571,170 -> 571,171 -> 573,171 -> 573,166 -> 573,171 -> 575,171 -> 575,161 -> 575,171 -> 577,171 -> 577,165 -> 577,171
+531,98 -> 531,102 -> 526,102 -> 526,109 -> 540,109 -> 540,102 -> 535,102 -> 535,98
+553,133 -> 558,133
+496,35 -> 496,29 -> 496,35 -> 498,35 -> 498,26 -> 498,35 -> 500,35 -> 500,25 -> 500,35 -> 502,35 -> 502,34 -> 502,35 -> 504,35 -> 504,31 -> 504,35 -> 506,35 -> 506,33 -> 506,35 -> 508,35 -> 508,25 -> 508,35
+511,53 -> 515,53
+496,35 -> 496,29 -> 496,35 -> 498,35 -> 498,26 -> 498,35 -> 500,35 -> 500,25 -> 500,35 -> 502,35 -> 502,34 -> 502,35 -> 504,35 -> 504,31 -> 504,35 -> 506,35 -> 506,33 -> 506,35 -> 508,35 -> 508,25 -> 508,35
+551,158 -> 551,154 -> 551,158 -> 553,158 -> 553,156 -> 553,158 -> 555,158 -> 555,152 -> 555,158 -> 557,158 -> 557,149 -> 557,158 -> 559,158 -> 559,156 -> 559,158 -> 561,158 -> 561,152 -> 561,158 -> 563,158 -> 563,155 -> 563,158 -> 565,158 -> 565,153 -> 565,158 -> 567,158 -> 567,155 -> 567,158 -> 569,158 -> 569,149 -> 569,158
+561,171 -> 561,162 -> 561,171 -> 563,171 -> 563,168 -> 563,171 -> 565,171 -> 565,163 -> 565,171 -> 567,171 -> 567,163 -> 567,171 -> 569,171 -> 569,161 -> 569,171 -> 571,171 -> 571,170 -> 571,171 -> 573,171 -> 573,166 -> 573,171 -> 575,171 -> 575,161 -> 575,171 -> 577,171 -> 577,165 -> 577,171
+561,171 -> 561,162 -> 561,171 -> 563,171 -> 563,168 -> 563,171 -> 565,171 -> 565,163 -> 565,171 -> 567,171 -> 567,163 -> 567,171 -> 569,171 -> 569,161 -> 569,171 -> 571,171 -> 571,170 -> 571,171 -> 573,171 -> 573,166 -> 573,171 -> 575,171 -> 575,161 -> 575,171 -> 577,171 -> 577,165 -> 577,171
+543,144 -> 543,145 -> 560,145 -> 560,144
+522,69 -> 527,69
+551,158 -> 551,154 -> 551,158 -> 553,158 -> 553,156 -> 553,158 -> 555,158 -> 555,152 -> 555,158 -> 557,158 -> 557,149 -> 557,158 -> 559,158 -> 559,156 -> 559,158 -> 561,158 -> 561,152 -> 561,158 -> 563,158 -> 563,155 -> 563,158 -> 565,158 -> 565,153 -> 565,158 -> 567,158 -> 567,155 -> 567,158 -> 569,158 -> 569,149 -> 569,158
+560,133 -> 565,133
+561,139 -> 566,139
+518,94 -> 518,95 -> 532,95 -> 532,94
+497,13 -> 497,17 -> 489,17 -> 489,22 -> 502,22 -> 502,17 -> 501,17 -> 501,13
+531,98 -> 531,102 -> 526,102 -> 526,109 -> 540,109 -> 540,102 -> 535,102 -> 535,98
+553,118 -> 553,120 -> 549,120 -> 549,124 -> 561,124 -> 561,120 -> 557,120 -> 557,118
+561,171 -> 561,162 -> 561,171 -> 563,171 -> 563,168 -> 563,171 -> 565,171 -> 565,163 -> 565,171 -> 567,171 -> 567,163 -> 567,171 -> 569,171 -> 569,161 -> 569,171 -> 571,171 -> 571,170 -> 571,171 -> 573,171 -> 573,166 -> 573,171 -> 575,171 -> 575,161 -> 575,171 -> 577,171 -> 577,165 -> 577,171
+501,48 -> 501,44 -> 501,48 -> 503,48 -> 503,39 -> 503,48 -> 505,48 -> 505,39 -> 505,48 -> 507,48 -> 507,41 -> 507,48 -> 509,48 -> 509,41 -> 509,48 -> 511,48 -> 511,47 -> 511,48 -> 513,48 -> 513,47 -> 513,48 -> 515,48 -> 515,43 -> 515,48
+496,35 -> 496,29 -> 496,35 -> 498,35 -> 498,26 -> 498,35 -> 500,35 -> 500,25 -> 500,35 -> 502,35 -> 502,34 -> 502,35 -> 504,35 -> 504,31 -> 504,35 -> 506,35 -> 506,33 -> 506,35 -> 508,35 -> 508,25 -> 508,35
+517,53 -> 521,53
+501,48 -> 501,44 -> 501,48 -> 503,48 -> 503,39 -> 503,48 -> 505,48 -> 505,39 -> 505,48 -> 507,48 -> 507,41 -> 507,48 -> 509,48 -> 509,41 -> 509,48 -> 511,48 -> 511,47 -> 511,48 -> 513,48 -> 513,47 -> 513,48 -> 515,48 -> 515,43 -> 515,48
+518,94 -> 518,95 -> 532,95 -> 532,94
+520,78 -> 525,78
+501,48 -> 501,44 -> 501,48 -> 503,48 -> 503,39 -> 503,48 -> 505,48 -> 505,39 -> 505,48 -> 507,48 -> 507,41 -> 507,48 -> 509,48 -> 509,41 -> 509,48 -> 511,48 -> 511,47 -> 511,48 -> 513,48 -> 513,47 -> 513,48 -> 515,48 -> 515,43 -> 515,48
+501,48 -> 501,44 -> 501,48 -> 503,48 -> 503,39 -> 503,48 -> 505,48 -> 505,39 -> 505,48 -> 507,48 -> 507,41 -> 507,48 -> 509,48 -> 509,41 -> 509,48 -> 511,48 -> 511,47 -> 511,48 -> 513,48 -> 513,47 -> 513,48 -> 515,48 -> 515,43 -> 515,48
+501,48 -> 501,44 -> 501,48 -> 503,48 -> 503,39 -> 503,48 -> 505,48 -> 505,39 -> 505,48 -> 507,48 -> 507,41 -> 507,48 -> 509,48 -> 509,41 -> 509,48 -> 511,48 -> 511,47 -> 511,48 -> 513,48 -> 513,47 -> 513,48 -> 515,48 -> 515,43 -> 515,48
+546,114 -> 546,115 -> 554,115 -> 554,114
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+561,171 -> 561,162 -> 561,171 -> 563,171 -> 563,168 -> 563,171 -> 565,171 -> 565,163 -> 565,171 -> 567,171 -> 567,163 -> 567,171 -> 569,171 -> 569,161 -> 569,171 -> 571,171 -> 571,170 -> 571,171 -> 573,171 -> 573,166 -> 573,171 -> 575,171 -> 575,161 -> 575,171 -> 577,171 -> 577,165 -> 577,171
+519,72 -> 524,72
+551,158 -> 551,154 -> 551,158 -> 553,158 -> 553,156 -> 553,158 -> 555,158 -> 555,152 -> 555,158 -> 557,158 -> 557,149 -> 557,158 -> 559,158 -> 559,156 -> 559,158 -> 561,158 -> 561,152 -> 561,158 -> 563,158 -> 563,155 -> 563,158 -> 565,158 -> 565,153 -> 565,158 -> 567,158 -> 567,155 -> 567,158 -> 569,158 -> 569,149 -> 569,158
+563,130 -> 568,130
+551,158 -> 551,154 -> 551,158 -> 553,158 -> 553,156 -> 553,158 -> 555,158 -> 555,152 -> 555,158 -> 557,158 -> 557,149 -> 557,158 -> 559,158 -> 559,156 -> 559,158 -> 561,158 -> 561,152 -> 561,158 -> 563,158 -> 563,155 -> 563,158 -> 565,158 -> 565,153 -> 565,158 -> 567,158 -> 567,155 -> 567,158 -> 569,158 -> 569,149 -> 569,158
+561,171 -> 561,162 -> 561,171 -> 563,171 -> 563,168 -> 563,171 -> 565,171 -> 565,163 -> 565,171 -> 567,171 -> 567,163 -> 567,171 -> 569,171 -> 569,161 -> 569,171 -> 571,171 -> 571,170 -> 571,171 -> 573,171 -> 573,166 -> 573,171 -> 575,171 -> 575,161 -> 575,171 -> 577,171 -> 577,165 -> 577,171
+501,48 -> 501,44 -> 501,48 -> 503,48 -> 503,39 -> 503,48 -> 505,48 -> 505,39 -> 505,48 -> 507,48 -> 507,41 -> 507,48 -> 509,48 -> 509,41 -> 509,48 -> 511,48 -> 511,47 -> 511,48 -> 513,48 -> 513,47 -> 513,48 -> 515,48 -> 515,43 -> 515,48
+531,98 -> 531,102 -> 526,102 -> 526,109 -> 540,109 -> 540,102 -> 535,102 -> 535,98
+534,111 -> 534,112 -> 549,112 -> 549,111
+501,48 -> 501,44 -> 501,48 -> 503,48 -> 503,39 -> 503,48 -> 505,48 -> 505,39 -> 505,48 -> 507,48 -> 507,41 -> 507,48 -> 509,48 -> 509,41 -> 509,48 -> 511,48 -> 511,47 -> 511,48 -> 513,48 -> 513,47 -> 513,48 -> 515,48 -> 515,43 -> 515,48
+561,171 -> 561,162 -> 561,171 -> 563,171 -> 563,168 -> 563,171 -> 565,171 -> 565,163 -> 565,171 -> 567,171 -> 567,163 -> 567,171 -> 569,171 -> 569,161 -> 569,171 -> 571,171 -> 571,170 -> 571,171 -> 573,171 -> 573,166 -> 573,171 -> 575,171 -> 575,161 -> 575,171 -> 577,171 -> 577,165 -> 577,171
+501,48 -> 501,44 -> 501,48 -> 503,48 -> 503,39 -> 503,48 -> 505,48 -> 505,39 -> 505,48 -> 507,48 -> 507,41 -> 507,48 -> 509,48 -> 509,41 -> 509,48 -> 511,48 -> 511,47 -> 511,48 -> 513,48 -> 513,47 -> 513,48 -> 515,48 -> 515,43 -> 515,48
+551,158 -> 551,154 -> 551,158 -> 553,158 -> 553,156 -> 553,158 -> 555,158 -> 555,152 -> 555,158 -> 557,158 -> 557,149 -> 557,158 -> 559,158 -> 559,156 -> 559,158 -> 561,158 -> 561,152 -> 561,158 -> 563,158 -> 563,155 -> 563,158 -> 565,158 -> 565,153 -> 565,158 -> 567,158 -> 567,155 -> 567,158 -> 569,158 -> 569,149 -> 569,158
\ No newline at end of file
diff --git a/data/day15/example01.txt b/data/day15/example01.txt
new file mode 100644
index 0000000..6d6c325
--- /dev/null
+++ b/data/day15/example01.txt
@@ -0,0 +1,15 @@
+10
+Sensor at x=2, y=18: closest beacon is at x=-2, y=15
+Sensor at x=9, y=16: closest beacon is at x=10, y=16
+Sensor at x=13, y=2: closest beacon is at x=15, y=3
+Sensor at x=12, y=14: closest beacon is at x=10, y=16
+Sensor at x=10, y=20: closest beacon is at x=10, y=16
+Sensor at x=14, y=17: closest beacon is at x=10, y=16
+Sensor at x=8, y=7: closest beacon is at x=2, y=10
+Sensor at x=2, y=0: closest beacon is at x=2, y=10
+Sensor at x=0, y=11: closest beacon is at x=2, y=10
+Sensor at x=20, y=14: closest beacon is at x=25, y=17
+Sensor at x=17, y=20: closest beacon is at x=21, y=22
+Sensor at x=16, y=7: closest beacon is at x=15, y=3
+Sensor at x=14, y=3: closest beacon is at x=15, y=3
+Sensor at x=20, y=1: closest beacon is at x=15, y=3
\ No newline at end of file
diff --git a/data/day15/input.txt b/data/day15/input.txt
new file mode 100644
index 0000000..e1e288b
--- /dev/null
+++ b/data/day15/input.txt
@@ -0,0 +1,32 @@
+2000000
+Sensor at x=3859432, y=2304903: closest beacon is at x=3677247, y=3140958
+Sensor at x=2488890, y=2695345: closest beacon is at x=1934788, y=2667279
+Sensor at x=3901948, y=701878: closest beacon is at x=4095477, y=368031
+Sensor at x=2422190, y=1775708: closest beacon is at x=1765036, y=2000000
+Sensor at x=2703846, y=3282799: closest beacon is at x=2121069, y=3230302
+Sensor at x=172003, y=2579074: closest beacon is at x=-77667, y=3197309
+Sensor at x=1813149, y=1311283: closest beacon is at x=1765036, y=2000000
+Sensor at x=1704453, y=2468117: closest beacon is at x=1934788, y=2667279
+Sensor at x=1927725, y=2976002: closest beacon is at x=1934788, y=2667279
+Sensor at x=3176646, y=1254463: closest beacon is at x=2946873, y=2167634
+Sensor at x=2149510, y=3722117: closest beacon is at x=2121069, y=3230302
+Sensor at x=3804434, y=251015: closest beacon is at x=4095477, y=368031
+Sensor at x=2613561, y=3932220: closest beacon is at x=2121069, y=3230302
+Sensor at x=3997794, y=3291220: closest beacon is at x=3677247, y=3140958
+Sensor at x=98328, y=3675176: closest beacon is at x=-77667, y=3197309
+Sensor at x=2006541, y=2259601: closest beacon is at x=1934788, y=2667279
+Sensor at x=663904, y=122919: closest beacon is at x=1618552, y=-433244
+Sensor at x=1116472, y=3349728: closest beacon is at x=2121069, y=3230302
+Sensor at x=2810797, y=2300748: closest beacon is at x=2946873, y=2167634
+Sensor at x=1760767, y=2024355: closest beacon is at x=1765036, y=2000000
+Sensor at x=3098487, y=2529092: closest beacon is at x=2946873, y=2167634
+Sensor at x=1716839, y=634872: closest beacon is at x=1618552, y=-433244
+Sensor at x=9323, y=979154: closest beacon is at x=-245599, y=778791
+Sensor at x=1737623, y=2032367: closest beacon is at x=1765036, y=2000000
+Sensor at x=26695, y=3049071: closest beacon is at x=-77667, y=3197309
+Sensor at x=3691492, y=3766350: closest beacon is at x=3677247, y=3140958
+Sensor at x=730556, y=1657010: closest beacon is at x=1765036, y=2000000
+Sensor at x=506169, y=3958647: closest beacon is at x=-77667, y=3197309
+Sensor at x=2728744, y=23398: closest beacon is at x=1618552, y=-433244
+Sensor at x=3215227, y=3077078: closest beacon is at x=3677247, y=3140958
+Sensor at x=2209379, y=3030851: closest beacon is at x=2121069, y=3230302
\ No newline at end of file
diff --git a/src/common/pos.rs b/src/common/pos.rs
index d5ffb07..5e692a2 100644
--- a/src/common/pos.rs
+++ b/src/common/pos.rs
@@ -22,6 +22,10 @@ impl<T> Pos<T>
 where
     T: Num + Copy,
 {
+    pub fn splat(v: T) -> Pos<T> {
+        Pos(v, v)
+    }
+
     pub fn x(&self) -> T {
         self.0
     }
@@ -259,3 +263,16 @@ where
         Pos::mul(*self, *rhs)
     }
 }
+
+impl<T> Pos<T>
+where
+    T: Num + Signed + Copy,
+{
+    pub fn taxicab_origin(&self) -> T {
+        self.0.abs() + self.1.abs()
+    }
+
+    pub fn taxicab(&self, other: &Pos<T>) -> T {
+        (self.0 - other.0).abs() + (self.1 - other.1).abs()
+    }
+}
diff --git a/src/days/day02/mod.rs b/src/days/day02/mod.rs
index 39c5efb..73fc25e 100644
--- a/src/days/day02/mod.rs
+++ b/src/days/day02/mod.rs
@@ -215,7 +215,7 @@ mod test {
     fn test_part2() -> Result<()> {
         let day = Day {};
         let lines = read_lines(day.get_day_number(), "example01.txt")?;
-        let expected = ResultType::Nothing;
+        let expected = ResultType::Integer(12);
         let result = day.part2(&lines)?;
         assert_eq!(result, expected);
 
diff --git a/src/days/day07/mod.rs b/src/days/day07/mod.rs
new file mode 100644
index 0000000..8c4c791
--- /dev/null
+++ b/src/days/day07/mod.rs
@@ -0,0 +1,341 @@
+use std::{
+    cell::{Cell, RefCell},
+    num::ParseIntError,
+    rc::{Rc, Weak},
+};
+
+use super::template::{DayTrait, ResultType};
+use thiserror::Error;
+
+const DAY_NUMBER: usize = 7;
+
+pub struct Day;
+
+impl DayTrait for Day {
+    fn get_day_number(&self) -> usize {
+        DAY_NUMBER
+    }
+
+    fn part1(&self, lines: &[String]) -> anyhow::Result<ResultType> {
+        let root = Directory::parse(lines)?;
+        let result = root
+            .iter()
+            .filter_map(|dir| {
+                let size = dir.size();
+                if size <= 100000 {
+                    Some(size)
+                } else {
+                    None
+                }
+            })
+            .sum();
+        Ok(ResultType::Integer(result))
+    }
+
+    fn part2(&self, lines: &[String]) -> anyhow::Result<ResultType> {
+        const AVAIL: i64 = 70_000_000;
+        const REQUIRED: i64 = 30_000_000;
+        let root = Directory::parse(lines)?;
+        let to_free = REQUIRED - (AVAIL - root.size());
+        let result = root
+            .iter()
+            .filter_map(|dir| {
+                let size = dir.size();
+                if size >= to_free {
+                    Some(size)
+                } else {
+                    None
+                }
+            })
+            .min()
+            .unwrap_or(0);
+        Ok(ResultType::Integer(result))
+    }
+}
+
+#[derive(Debug, Error)]
+enum DirectoryError {
+    #[error("Directory does not exist: {0}")]
+    NoSuchDirectory(String),
+
+    #[error("Directory has no parent")]
+    NoParentDirectory,
+
+    #[error("Illegal command: {0}")]
+    IllegalCommand(String),
+
+    #[error("No a legal Number")]
+    IllegalNumber(#[from] ParseIntError),
+}
+
+#[derive(Debug)]
+struct Node {
+    parent: Option<Weak<RefCell<Node>>>,
+    name: String,
+    sub_dirs: Vec<Rc<RefCell<Node>>>,
+    file_size: i64,
+    size: Cell<Option<i64>>,
+}
+
+impl Node {
+    fn root() -> Node {
+        Node {
+            parent: None,
+            name: "/".to_owned(),
+            sub_dirs: vec![],
+            file_size: 0,
+            size: Cell::new(None),
+        }
+    }
+
+    fn add_subdir(&mut self, subdir: Rc<RefCell<Node>>) {
+        self.sub_dirs.push(subdir);
+    }
+
+    fn add_file(&mut self, _name: &str, size: i64) {
+        self.file_size += size;
+    }
+
+    fn size(&self) -> i64 {
+        self.size.get().unwrap_or_else(|| {
+            let subsize: i64 = self.sub_dirs.iter().map(|sub| sub.borrow().size()).sum();
+            let size = subsize + self.file_size;
+
+            self.size.set(Some(size));
+            size
+        })
+    }
+}
+
+#[derive(Debug, Clone)]
+struct Directory {
+    node: Rc<RefCell<Node>>,
+}
+
+impl Directory {
+    pub fn root() -> Directory {
+        Directory {
+            node: Rc::new(RefCell::new(Node::root())),
+        }
+    }
+
+    fn create(node: Rc<RefCell<Node>>) -> Directory {
+        Directory { node }
+    }
+
+    #[allow(dead_code)]
+    pub fn name(&self) -> String {
+        self.node.borrow().name.to_string()
+    }
+
+    pub fn size(&self) -> i64 {
+        self.node.borrow().size()
+    }
+
+    #[allow(dead_code)]
+    pub fn file_size(&self) -> i64 {
+        self.node.borrow().file_size
+    }
+
+    pub fn add_subdir(&mut self, name: &str) {
+        let subdir = Rc::new(RefCell::new(Node {
+            parent: Some(Rc::downgrade(&self.node)),
+            name: name.to_owned(),
+            sub_dirs: vec![],
+            file_size: 0,
+            size: Cell::new(None),
+        }));
+        self.node.borrow_mut().add_subdir(subdir);
+    }
+
+    pub fn add_file(&mut self, name: &str, size: i64) {
+        self.node.borrow_mut().add_file(name, size)
+    }
+
+    pub fn parent(&self) -> Option<Directory> {
+        self.node
+            .borrow()
+            .parent
+            .as_ref()
+            .and_then(|node| node.upgrade())
+            .map(|node| Directory { node })
+    }
+
+    pub fn get_subdir(&self, name: &str) -> Option<Directory> {
+        let node = self.node.borrow();
+        let sub_node = node.sub_dirs.iter().find(|node| node.borrow().name == name);
+        sub_node.map(|node| Directory::create(node.clone()))
+    }
+
+    pub fn parse(lines: &[String]) -> Result<Directory, DirectoryError> {
+        let root = Directory::root();
+        let mut current = root.clone();
+        for line in lines {
+            match line.split_whitespace().collect::<Vec<&str>>()[..] {
+                ["$", "cd", dir] => {
+                    current = match dir {
+                        "/" => root.clone(),
+                        ".." => {
+                            let Some(next) = current.parent() else {
+                            return Err(DirectoryError::NoParentDirectory);
+                        };
+                            next
+                        }
+                        _ => {
+                            let Some(next) = current.get_subdir(dir) else {
+                            return Err(DirectoryError::NoSuchDirectory(dir.to_owned()))
+                        };
+                            next
+                        }
+                    };
+                }
+                ["$", "ls"] => {} // Command can safely be ignored
+                ["dir", name] => {
+                    current.add_subdir(name);
+                }
+                [size, name] => {
+                    let size = size.parse::<i64>()?;
+                    current.add_file(name, size);
+                }
+                _ => return Err(DirectoryError::IllegalCommand(line.to_owned())),
+            }
+        }
+        Ok(root)
+    }
+
+    pub fn iter(&self) -> DirectoryIterator {
+        DirectoryIterator::create(self.node.clone())
+    }
+}
+
+#[derive(Debug)]
+struct DirectoryIterator {
+    directory: Rc<RefCell<Node>>,
+    subdirectory: Option<(usize, Box<DirectoryIterator>)>,
+    finished: bool,
+}
+
+impl DirectoryIterator {
+    pub fn create(directory: Rc<RefCell<Node>>) -> DirectoryIterator {
+        DirectoryIterator {
+            directory,
+            subdirectory: None,
+            finished: false,
+        }
+    }
+}
+
+impl Iterator for DirectoryIterator {
+    type Item = Directory;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        if self.finished {
+            return None;
+        }
+        if let Some((subdirectory, sub_iterator)) = self.subdirectory.as_mut() {
+            if let Some(next) = sub_iterator.next() {
+                Some(next)
+            } else {
+                let dir = self.directory.borrow();
+                let subdirectory = *subdirectory + 1;
+                if subdirectory < dir.sub_dirs.len() {
+                    let subdir = dir.sub_dirs[subdirectory].clone();
+                    let mut sub_iterator = DirectoryIterator::create(subdir);
+                    let result = sub_iterator.next();
+                    self.subdirectory = Some((subdirectory, Box::new(sub_iterator)));
+                    result
+                } else {
+                    self.finished = true;
+                    None
+                }
+            }
+        } else {
+            let dir = self.directory.borrow();
+            if !dir.sub_dirs.is_empty() {
+                let subdir = dir.sub_dirs[0].clone();
+                let sub_iterator = DirectoryIterator::create(subdir);
+                self.subdirectory = Some((0, Box::new(sub_iterator)));
+            } else {
+                self.finished = true;
+            }
+
+            Some(Directory {
+                node: self.directory.clone(),
+            })
+        }
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    use crate::common::file::read_lines;
+    use anyhow::Result;
+
+    #[test]
+    fn test_create_directory() {
+        let directory = Directory::root();
+        assert_eq!(directory.name(), "/");
+        assert_eq!(directory.size(), 0);
+    }
+
+    #[test]
+    fn test_create_and_get_subdir() {
+        let mut root = Directory::root();
+        root.add_file("file1", 100);
+        root.add_file("file2", 200);
+        root.add_subdir("subdir");
+        let mut subdir = root.get_subdir("subdir").unwrap();
+        subdir.add_file("file3", 300);
+        subdir.add_file("file4", 400);
+
+        assert_eq!(subdir.name(), "subdir");
+        assert_eq!(subdir.size(), 700);
+        assert_eq!(root.size(), 1000);
+        assert_eq!(root.file_size(), 300);
+    }
+
+    #[test]
+    fn test_total_size() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let dir = Directory::parse(&lines)?;
+        assert_eq!(dir.size(), 48381165);
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_iterator() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let expected = vec!["/", "a", "e", "d"];
+        let dir = Directory::parse(&lines)?;
+        let result: Vec<_> = dir.iter().map(|dir| dir.name()).collect();
+        assert_eq!(result, expected);
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_part1() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let expected = ResultType::Integer(95437);
+        let result = day.part1(&lines)?;
+        assert_eq!(result, expected);
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_part2() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let expected = ResultType::Integer(24933642);
+        let result = day.part2(&lines)?;
+        assert_eq!(result, expected);
+
+        Ok(())
+    }
+}
diff --git a/src/days/day08/mod.rs b/src/days/day08/mod.rs
new file mode 100644
index 0000000..77b5fcc
--- /dev/null
+++ b/src/days/day08/mod.rs
@@ -0,0 +1,232 @@
+use super::template::{DayTrait, ResultType};
+use itertools::{iproduct, FoldWhile, Itertools};
+use thiserror::Error;
+
+const DAY_NUMBER: usize = 8;
+
+pub struct Day;
+
+impl DayTrait for Day {
+    fn get_day_number(&self) -> usize {
+        DAY_NUMBER
+    }
+
+    fn part1(&self, lines: &[String]) -> anyhow::Result<ResultType> {
+        let forest = Forest::parse(lines)?;
+        let result = forest.count_visible();
+        Ok(ResultType::Integer(result))
+    }
+
+    fn part2(&self, lines: &[String]) -> anyhow::Result<ResultType> {
+        let forest = Forest::parse(lines)?;
+        let result = forest.best_score();
+        Ok(ResultType::Integer(result))
+    }
+}
+
+#[derive(Debug, Error)]
+enum ForestError {
+    #[error("Not a legal digit: {0}")]
+    NoLegalDigit(char),
+
+    #[error("The Forst is not a rectangle")]
+    NonRectangleForest,
+
+    #[error("Zero Sized Forest not allowed")]
+    NoZeroSizedForest,
+}
+
+#[derive(Debug)]
+struct Forest {
+    trees: Vec<Vec<u32>>,
+    width: usize,
+    height: usize,
+}
+
+impl Forest {
+    pub fn create(trees: Vec<Vec<u32>>) -> Result<Self, ForestError> {
+        let height = trees.len();
+        if height == 0 {
+            return Err(ForestError::NoZeroSizedForest);
+        }
+        let width = trees[0].len();
+        if width == 0 {
+            return Err(ForestError::NoZeroSizedForest);
+        }
+
+        for row in trees.iter() {
+            if row.len() != width {
+                return Err(ForestError::NonRectangleForest);
+            }
+        }
+
+        Ok(Forest {
+            trees,
+            width,
+            height,
+        })
+    }
+
+    pub fn parse(lines: &[String]) -> Result<Forest, ForestError> {
+        lines
+            .iter()
+            .map(|line| {
+                line.chars()
+                    .map(|height| height.to_digit(10).ok_or(ForestError::NoLegalDigit(height)))
+                    .collect::<Result<Vec<_>, _>>()
+            })
+            .collect::<Result<Vec<_>, _>>()
+            .and_then(Forest::create)
+    }
+
+    pub fn count_visible(&self) -> i64 {
+        let mut vis_count = 2 * (self.width + self.height - 2) as i64;
+        let mut visible = vec![vec![false; self.width - 2]; self.height - 2];
+
+        for y in 1..self.height - 1 {
+            let mut talest_seen = self.trees[y][0];
+            for x in 1..self.width - 1 {
+                let tree = self.trees[y][x];
+                if tree > talest_seen {
+                    vis_count += 1;
+                    visible[y - 1][x - 1] = true;
+                    talest_seen = self.trees[y][x];
+                }
+            }
+
+            let mut talest_seen = self.trees[y][self.width - 1];
+            for x in (1..self.width - 1).rev() {
+                let tree = self.trees[y][x];
+                if tree > talest_seen {
+                    if !visible[y - 1][x - 1] {
+                        vis_count += 1;
+                        visible[y - 1][x - 1] = true;
+                    }
+                    talest_seen = self.trees[y][x];
+                }
+            }
+        }
+
+        for x in 1..self.width - 1 {
+            let mut talest_seen = self.trees[0][x];
+            for y in 1..self.height - 1 {
+                let tree = self.trees[y][x];
+                if tree > talest_seen {
+                    if !visible[y - 1][x - 1] {
+                        vis_count += 1;
+                        visible[y - 1][x - 1] = true;
+                    }
+                    talest_seen = self.trees[y][x];
+                }
+            }
+
+            let mut talest_seen = self.trees[self.height - 1][x];
+            for y in (1..self.height - 1).rev() {
+                let tree = self.trees[y][x];
+                if tree > talest_seen {
+                    if !visible[y - 1][x - 1] {
+                        vis_count += 1;
+                        visible[y - 1][x - 1] = true;
+                    }
+                    talest_seen = self.trees[y][x];
+                }
+            }
+        }
+
+        vis_count
+    }
+
+    pub fn best_score(&self) -> i64 {
+        iproduct!(1..self.width - 1, 1..self.height - 1)
+            .map(|(x, y)| self.score(x, y))
+            .max()
+            // None can only happen when we have a forrest with no inner trees.
+            // In that case 0 is the correct solution.
+            // We already forbid zero height and zero width forests during create.
+            .unwrap_or(0)
+    }
+
+    fn score(&self, x: usize, y: usize) -> i64 {
+        let tree = self.trees[y][x];
+        let left = (0..x)
+            .rev()
+            .fold_while(0, |acc, x| {
+                if self.trees[y][x] < tree {
+                    FoldWhile::Continue(acc + 1)
+                } else {
+                    FoldWhile::Done(acc + 1)
+                }
+            })
+            .into_inner();
+        let right = (x + 1..self.width)
+            .fold_while(0, |acc, x| {
+                if self.trees[y][x] < tree {
+                    FoldWhile::Continue(acc + 1)
+                } else {
+                    FoldWhile::Done(acc + 1)
+                }
+            })
+            .into_inner();
+        let up = (0..y)
+            .rev()
+            .fold_while(0, |acc, y| {
+                if self.trees[y][x] < tree {
+                    FoldWhile::Continue(acc + 1)
+                } else {
+                    FoldWhile::Done(acc + 1)
+                }
+            })
+            .into_inner();
+        let down = (y + 1..self.height)
+            .fold_while(0, |acc, y| {
+                if self.trees[y][x] < tree {
+                    FoldWhile::Continue(acc + 1)
+                } else {
+                    FoldWhile::Done(acc + 1)
+                }
+            })
+            .into_inner();
+
+        left * right * up * down
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    use crate::common::file::read_lines;
+    use anyhow::Result;
+
+    #[test]
+    fn test_parse() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let forest = Forest::parse(&lines)?;
+        assert_eq!(forest.width, 5);
+        assert_eq!(forest.height, 5);
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_part1() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let expected = ResultType::Integer(21);
+        let result = day.part1(&lines)?;
+        assert_eq!(result, expected);
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_part2() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let expected = ResultType::Integer(8);
+        let result = day.part2(&lines)?;
+        assert_eq!(result, expected);
+
+        Ok(())
+    }
+}
diff --git a/src/days/day09/mod.rs b/src/days/day09/mod.rs
new file mode 100644
index 0000000..533acf4
--- /dev/null
+++ b/src/days/day09/mod.rs
@@ -0,0 +1,152 @@
+use super::template::{DayTrait, ResultType};
+use crate::common::{direction::Direction, pos::Pos};
+use std::{collections::HashSet, num::ParseIntError};
+use thiserror::Error;
+
+const DAY_NUMBER: usize = 9;
+
+pub struct Day;
+
+impl DayTrait for Day {
+    fn get_day_number(&self) -> usize {
+        DAY_NUMBER
+    }
+
+    fn part1(&self, lines: &[String]) -> anyhow::Result<ResultType> {
+        let commands = parse_commands(lines)?;
+        let mut rope = Rope::create(2);
+        let result = rope.run(&commands);
+        Ok(ResultType::Integer(result))
+    }
+
+    fn part2(&self, lines: &[String]) -> anyhow::Result<ResultType> {
+        let commands = parse_commands(lines)?;
+        let mut rope = Rope::create(10);
+        let result = rope.run(&commands);
+        Ok(ResultType::Integer(result))
+    }
+}
+
+#[derive(Debug, Error)]
+enum RopeError {
+    #[error("Not a legal command {0}")]
+    CommandUnknown(String),
+
+    #[error["not a legal Direction {0}"]]
+    DirectionUnknown(String),
+
+    #[error("Not a legal Integer")]
+    StepParseError(#[from] ParseIntError),
+}
+
+fn parse_commands(lines: &[String]) -> Result<Vec<(Direction, usize)>, RopeError> {
+    lines.iter().map(parse_line).collect::<Result<_, _>>()
+}
+
+fn parse_line(line: &String) -> Result<(Direction, usize), RopeError> {
+    match line.split_whitespace().collect::<Vec<_>>()[..] {
+        [direction, steps] => {
+            let direction = match direction {
+                "U" => Direction::North,
+                "D" => Direction::South,
+                "R" => Direction::East,
+                "L" => Direction::West,
+                _ => {
+                    return Err(RopeError::DirectionUnknown(direction.to_owned()));
+                }
+            };
+            let steps = steps.parse()?;
+            Ok((direction, steps))
+        }
+        _ => Err(RopeError::CommandUnknown(line.to_owned())),
+    }
+}
+
+fn get_closer(first: Pos<i32>, second: Pos<i32>) -> Option<Pos<i32>> {
+    let diff = second - first;
+    if diff.x().abs() <= 1 && diff.y().abs() <= 1 {
+        None
+    } else {
+        Some(Pos::new(diff.x().signum(), diff.y().signum()))
+    }
+}
+
+#[derive(Debug)]
+struct Rope {
+    head: Pos<i32>,
+    knots: Vec<Pos<i32>>,
+}
+
+impl Rope {
+    pub fn create(length: usize) -> Self {
+        assert!(length >= 2);
+        Rope {
+            head: Pos::new(0, 0),
+            knots: vec![Pos::new(0, 0); length - 1],
+        }
+    }
+
+    /**
+     * Moves the head one step into the given direction
+     * returns true if the whole rope moved, otherwise false
+     */
+    pub fn move_rope(&mut self, head_direction: Direction) -> bool {
+        self.head = self.head + head_direction;
+        let mut prev = self.head;
+        let mut knots_unmoved = self.knots.len();
+
+        for knot in self.knots.iter_mut() {
+            if let Some(diff) = get_closer(*knot, prev) {
+                *knot = *knot + diff;
+                prev = *knot;
+                knots_unmoved -= 1;
+            } else {
+                break;
+            }
+        }
+        knots_unmoved == 0
+    }
+
+    pub fn run(&mut self, commands: &[(Direction, usize)]) -> i64 {
+        let mut tail_visited = HashSet::new();
+        tail_visited.insert(self.knots.last().copied().unwrap());
+
+        for (direction, steps) in commands {
+            for _ in 0..*steps {
+                if self.move_rope(*direction) {
+                    tail_visited.insert(self.knots.last().copied().unwrap());
+                }
+            }
+        }
+        tail_visited.len() as i64
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    use crate::common::file::read_lines;
+    use anyhow::Result;
+
+    #[test]
+    fn test_part1() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let expected = ResultType::Integer(13);
+        let result = day.part1(&lines)?;
+        assert_eq!(result, expected);
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_part2() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example02.txt")?;
+        let expected = ResultType::Integer(36);
+        let result = day.part2(&lines)?;
+        assert_eq!(result, expected);
+
+        Ok(())
+    }
+}
diff --git a/src/days/day10/mod.rs b/src/days/day10/mod.rs
new file mode 100644
index 0000000..13bfdcf
--- /dev/null
+++ b/src/days/day10/mod.rs
@@ -0,0 +1,165 @@
+use super::template::{DayTrait, ResultType};
+use std::{num::ParseIntError, slice::Iter};
+use thiserror::Error;
+
+const DAY_NUMBER: usize = 10;
+
+pub struct Day;
+
+impl DayTrait for Day {
+    fn get_day_number(&self) -> usize {
+        DAY_NUMBER
+    }
+
+    fn part1(&self, lines: &[String]) -> anyhow::Result<ResultType> {
+        let instructions = lines
+            .iter()
+            .map(|line| Instruction::parse(line))
+            .collect::<Result<Vec<_>, _>>()?;
+        let result = CpuCycles::signal_strength(&instructions, &[20, 60, 100, 140, 180, 220]);
+        Ok(ResultType::Integer(result as i64))
+    }
+
+    fn part2(&self, lines: &[String]) -> anyhow::Result<ResultType> {
+        let instructions = lines
+            .iter()
+            .map(|line| Instruction::parse(line))
+            .collect::<Result<Vec<_>, _>>()?;
+        let result = CpuCycles::draw(&instructions);
+        Ok(ResultType::Lines(result))
+    }
+}
+
+#[derive(Debug, Error)]
+enum CpuError {
+    #[error("unknown instruction: {0}")]
+    UnknownInstruction(String),
+
+    #[error("could not parse Number")]
+    InvalidInteger(#[from] ParseIntError),
+}
+
+enum Instruction {
+    Add(i32),
+    Noop,
+}
+
+impl Instruction {
+    pub fn parse(line: &str) -> Result<Self, CpuError> {
+        if line == "noop" {
+            Ok(Instruction::Noop)
+        } else if line.starts_with("addx") {
+            let value = line[5..].parse()?;
+            Ok(Instruction::Add(value))
+        } else {
+            Err(CpuError::UnknownInstruction(line.to_owned()))
+        }
+    }
+}
+
+struct CpuCycles<'a> {
+    register: i32,
+    instructions: Iter<'a, Instruction>,
+    current: Option<i32>,
+}
+
+impl<'a> CpuCycles<'a> {
+    pub fn create(instructions: &'a [Instruction]) -> Self {
+        Self {
+            instructions: instructions.iter(),
+            register: 1,
+            current: None,
+        }
+    }
+
+    pub fn signal_strength(instructions: &'a [Instruction], to_collect: &[usize]) -> i32 {
+        CpuCycles::create(instructions)
+            .enumerate()
+            .filter_map(|(cycle, register)| {
+                if to_collect.contains(&(cycle + 1)) {
+                    Some(register * (cycle + 1) as i32)
+                } else {
+                    None
+                }
+            })
+            .sum()
+    }
+
+    pub fn draw(instructions: &'a [Instruction]) -> Vec<String> {
+        let mut result = Vec::new();
+        let mut line = "".to_owned();
+        for (cycle, sprite) in CpuCycles::create(instructions).enumerate() {
+            let cycle = (cycle % 40) as i32;
+            if (sprite - cycle).abs() <= 1 {
+                line.push('#');
+            } else {
+                line.push(' ');
+            }
+            if cycle == 39 {
+                result.push(line.to_owned());
+                line = "".to_owned();
+            }
+        }
+        result
+    }
+}
+
+impl<'a> Iterator for CpuCycles<'a> {
+    type Item = i32;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        if let Some(value) = self.current {
+            let start_register = self.register;
+            self.register += value;
+            self.current = None;
+            Some(start_register)
+        } else if let Some(instruction) = self.instructions.next() {
+            match instruction {
+                Instruction::Add(value) => self.current = Some(*value),
+                Instruction::Noop => {}
+            }
+            Some(self.register)
+        } else {
+            None
+        }
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    use crate::common::file::read_lines;
+    use anyhow::Result;
+
+    #[test]
+    fn test_simple() -> Result<()> {
+        let instructions = vec![Instruction::Noop, Instruction::Add(3), Instruction::Add(-5)];
+        let expected = vec![1, 1, 1, 4, 4];
+        let result = CpuCycles::create(&instructions).collect::<Vec<_>>();
+        assert_eq!(result, expected);
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_part1() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let expected = ResultType::Integer(13140);
+        let result = day.part1(&lines)?;
+        assert_eq!(result, expected);
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_part2() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let expected = ResultType::Lines(read_lines(day.get_day_number(), "expected01.txt")?);
+        let result = day.part2(&lines)?;
+        assert_eq!(result, expected);
+
+        Ok(())
+    }
+}
diff --git a/src/days/day11/mod.rs b/src/days/day11/mod.rs
new file mode 100644
index 0000000..0f2cd1e
--- /dev/null
+++ b/src/days/day11/mod.rs
@@ -0,0 +1,246 @@
+use super::template::{DayTrait, ResultType};
+use lazy_static::lazy_static;
+use regex::Regex;
+use std::{iter::zip, num::ParseIntError};
+use thiserror::Error;
+
+const DAY_NUMBER: usize = 11;
+
+pub struct Day;
+
+impl DayTrait for Day {
+    fn get_day_number(&self) -> usize {
+        DAY_NUMBER
+    }
+
+    fn part1(&self, lines: &[String]) -> anyhow::Result<ResultType> {
+        let troop = Troop::parse(lines)?;
+        Ok(ResultType::Integer(troop.play(20)))
+    }
+
+    fn part2(&self, lines: &[String]) -> anyhow::Result<ResultType> {
+        let troop = Troop::parse(lines)?;
+        Ok(ResultType::Integer(troop.play_again(10_000)))
+    }
+}
+
+#[derive(Debug, Error)]
+enum MonkeyError {
+    #[error("Not an Integer")]
+    NotAnInteger(#[from] ParseIntError),
+
+    #[error("Can't parse line: {0}")]
+    UnknownLine(String),
+
+    #[error("Did not expect end of Input")]
+    PrematureEndOfInput,
+}
+
+#[derive(Debug, PartialEq)]
+enum Operation {
+    Plus(i64),
+    Times(i64),
+    Squared,
+}
+
+impl Operation {
+    pub fn parse(line: &str) -> Operation {
+        match line.split_whitespace().collect::<Vec<_>>()[..] {
+            ["*", "old"] => Operation::Squared,
+            ["*", value] => Operation::Times(value.parse().unwrap()),
+            ["+", value] => Operation::Plus(value.parse().unwrap()),
+            _ => unreachable!(),
+        }
+    }
+
+    pub fn calc(&self, old: i64) -> i64 {
+        match self {
+            Operation::Plus(value) => old + *value,
+            Operation::Times(value) => old * value,
+            Operation::Squared => old.pow(2),
+        }
+    }
+}
+
+#[derive(Debug, PartialEq)]
+struct Monkey {
+    number: usize,
+    items: Vec<i64>,
+    operation: Operation,
+    divisor: i64,
+    good_monkey: usize,
+    bad_monkey: usize,
+}
+
+lazy_static! {
+    static ref MONKEY: Regex = Regex::new(r"Monkey (\d+)").unwrap();
+    static ref STARTING: Regex = Regex::new(r"Starting items: (\d+(?:, \d+)*)").unwrap();
+    static ref OP: Regex = Regex::new(r"Operation: new = old ([+*] \d+|\* old)").unwrap();
+    static ref TEST: Regex = Regex::new(r"Test: divisible by (\d+)").unwrap();
+    static ref NEXT: Regex = Regex::new(r"If (?:true|false): throw to monkey (\d+)").unwrap();
+}
+
+impl Monkey {
+    fn parse_line<'a>(re: &Regex, line: &'a str) -> Result<&'a str, MonkeyError> {
+        let caps = re
+            .captures(line)
+            .ok_or(MonkeyError::UnknownLine(line.to_owned()))?;
+        Ok(caps.get(1).unwrap().as_str())
+    }
+
+    pub fn parse_one(
+        iterator: &mut dyn Iterator<Item = &String>,
+    ) -> Result<Option<Monkey>, MonkeyError> {
+        if let Some(line) = iterator.next() {
+            let number: usize = Monkey::parse_line(&MONKEY, line)?.parse()?;
+
+            let line = iterator.next().ok_or(MonkeyError::PrematureEndOfInput)?;
+            let start = Monkey::parse_line(&STARTING, line)?;
+            let items = start
+                .split(", ")
+                .map(|item| item.parse::<i64>())
+                .collect::<Result<Vec<i64>, _>>()?;
+
+            let line = iterator.next().ok_or(MonkeyError::PrematureEndOfInput)?;
+            let operation = Operation::parse(Monkey::parse_line(&OP, line)?);
+
+            let line = iterator.next().ok_or(MonkeyError::PrematureEndOfInput)?;
+            let divisor: i64 = Monkey::parse_line(&TEST, line)?.parse()?;
+
+            let line = iterator.next().ok_or(MonkeyError::PrematureEndOfInput)?;
+            let good_monkey: usize = Monkey::parse_line(&NEXT, line)?.parse()?;
+
+            let line = iterator.next().ok_or(MonkeyError::PrematureEndOfInput)?;
+            let bad_monkey: usize = Monkey::parse_line(&NEXT, line)?.parse()?;
+
+            iterator.next();
+
+            Ok(Some(Monkey {
+                number,
+                items,
+                operation,
+                divisor,
+                good_monkey,
+                bad_monkey,
+            }))
+        } else {
+            Ok(None)
+        }
+    }
+
+    pub fn process(&self, value: i64) -> i64 {
+        self.operation.calc(value)
+    }
+
+    pub fn check(&self, value: i64) -> bool {
+        value % self.divisor == 0
+    }
+}
+
+struct Troop {
+    monkeys: Vec<Monkey>,
+}
+
+impl Troop {
+    pub fn parse(lines: &[String]) -> Result<Troop, MonkeyError> {
+        let mut iter = lines.iter();
+        let mut monkeys = Vec::new();
+        while let Some(monkey) = Monkey::parse_one(&mut iter)? {
+            monkeys.push(monkey);
+        }
+        Ok(Troop { monkeys })
+    }
+
+    fn do_play<F>(&self, rounds: usize, alter: F) -> i64
+    where
+        F: Fn(i64) -> i64,
+    {
+        let mut holding = vec![Vec::new(); self.monkeys.len()];
+        let mut inspected = vec![0i64; self.monkeys.len()];
+        for (holding, monkey) in zip(&mut holding, &self.monkeys) {
+            holding.extend(&monkey.items);
+        }
+        for _ in 0..rounds {
+            for (pos, monkey) in self.monkeys.iter().enumerate() {
+                let (good, bad): (Vec<_>, Vec<_>) = holding[pos]
+                    .iter()
+                    .map(|value| alter(monkey.process(*value)))
+                    .partition(|value| monkey.check(*value));
+                inspected[pos] += holding[pos].len() as i64;
+                holding.get_mut(pos).unwrap().clear();
+                holding.get_mut(monkey.good_monkey).unwrap().extend(&good);
+                holding.get_mut(monkey.bad_monkey).unwrap().extend(&bad);
+            }
+        }
+
+        inspected.sort_by(|a, b| b.cmp(a));
+        inspected.iter().take(2).product()
+    }
+
+    pub fn play(&self, rounds: usize) -> i64 {
+        self.do_play(rounds, |v| v / 3)
+    }
+
+    pub fn play_again(&self, rounds: usize) -> i64 {
+        let divisor: i64 = self.monkeys.iter().map(|monkey| monkey.divisor).product();
+        self.do_play(rounds, |v| v % divisor)
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    use crate::common::file::read_lines;
+    use anyhow::Result;
+
+    #[test]
+    fn test_parse() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let expected = Monkey {
+            number: 0,
+            items: vec![79, 98],
+            operation: Operation::Times(19),
+            divisor: 23,
+            good_monkey: 2,
+            bad_monkey: 3,
+        };
+        let result = Monkey::parse_one(&mut lines.iter())?.unwrap();
+        assert_eq!(result, expected);
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_parse_all() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let expected = 4;
+        let result = Troop::parse(&lines)?;
+        assert_eq!(result.monkeys.len(), expected);
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_part1() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let expected = ResultType::Integer(10605);
+        let result = day.part1(&lines)?;
+        assert_eq!(result, expected);
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_part2() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let expected = ResultType::Integer(2713310158);
+        let result = day.part2(&lines)?;
+        assert_eq!(result, expected);
+
+        Ok(())
+    }
+}
diff --git a/src/days/day12/mod.rs b/src/days/day12/mod.rs
new file mode 100644
index 0000000..c3f6ab1
--- /dev/null
+++ b/src/days/day12/mod.rs
@@ -0,0 +1,294 @@
+use std::collections::{BinaryHeap, HashSet};
+
+use crate::common::pos::Pos;
+
+use super::template::{DayTrait, ResultType};
+use thiserror::Error;
+
+const DAY_NUMBER: usize = 12;
+
+pub struct Day;
+
+impl DayTrait for Day {
+    fn get_day_number(&self) -> usize {
+        DAY_NUMBER
+    }
+
+    fn part1(&self, lines: &[String]) -> anyhow::Result<ResultType> {
+        let valley = Valley::parse(lines)?;
+        Ok(ResultType::Integer(valley.walk()? as i64))
+    }
+
+    fn part2(&self, lines: &[String]) -> anyhow::Result<ResultType> {
+        let valley = Valley::parse(lines)?;
+        Ok(ResultType::Integer(valley.walk_short()? as i64))
+    }
+}
+
+#[derive(Debug, Error)]
+enum ValleyError {
+    #[error("Not a legal terrain char: {0}")]
+    NotALegalCharacter(char),
+    #[error("Valley needs to be rectangle")]
+    NotAReactangleValley,
+    #[error("Valley map conatins no data")]
+    EmptyValley,
+    #[error("Could not find start point")]
+    NoStartFound,
+    #[error("Could not find exit point")]
+    NoExitFound,
+    #[error("No path found")]
+    NoPathFound,
+}
+
+#[derive(Debug, PartialEq, Eq)]
+struct Path {
+    length: usize,
+    height: char,
+    pos: Pos<usize>,
+}
+
+impl PartialOrd for Path {
+    fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
+        match other.length.partial_cmp(&self.length) {
+            Some(core::cmp::Ordering::Equal) => {}
+            ord => return ord,
+        }
+        match other.height.partial_cmp(&self.height) {
+            Some(core::cmp::Ordering::Equal) => {}
+            ord => return ord,
+        }
+        match self.pos.x().partial_cmp(&other.pos.x()) {
+            Some(core::cmp::Ordering::Equal) => {}
+            ord => return ord,
+        }
+        self.pos.y().partial_cmp(&other.pos.y())
+    }
+}
+
+impl Ord for Path {
+    fn cmp(&self, other: &Self) -> std::cmp::Ordering {
+        other
+            .length
+            .cmp(&self.length)
+            .then_with(|| other.height.cmp(&self.height))
+            .then_with(|| self.pos.x().cmp(&other.pos.x()))
+            .then_with(|| self.pos.y().cmp(&other.pos.y()))
+    }
+}
+
+impl Path {
+    pub fn new(length: usize, height: char, pos: Pos<usize>) -> Self {
+        Path {
+            length,
+            height,
+            pos,
+        }
+    }
+
+    pub fn next_path<'a>(&'a self, valley: &'a Valley) -> Neighbors<'a> {
+        Neighbors::new(self, valley)
+    }
+}
+
+struct Neighbors<'a> {
+    path: &'a Path,
+    valley: &'a Valley,
+    state: usize,
+}
+
+impl<'a> Neighbors<'a> {
+    pub fn new(path: &'a Path, valley: &'a Valley) -> Self {
+        Neighbors {
+            path,
+            state: 0,
+            valley,
+        }
+    }
+
+    fn next_pos(&mut self) -> Option<Pos<usize>> {
+        while self.state < 4 {
+            self.state += 1;
+            match self.state {
+                1 => {
+                    if self.path.pos.x() < self.valley.width() - 1 {
+                        return Some(Pos::new(self.path.pos.x() + 1, self.path.pos.y()));
+                    }
+                }
+                2 => {
+                    if self.path.pos.y() > 0 {
+                        return Some(Pos::new(self.path.pos.x(), self.path.pos.y() - 1));
+                    }
+                }
+                3 => {
+                    if self.path.pos.x() > 0 {
+                        return Some(Pos::new(self.path.pos.x() - 1, self.path.pos.y()));
+                    }
+                }
+                4 => {
+                    if self.path.pos.y() < self.valley.height() - 1 {
+                        return Some(Pos::new(self.path.pos.x(), self.path.pos.y() + 1));
+                    }
+                }
+                _ => {}
+            }
+        }
+        None
+    }
+}
+
+impl Iterator for Neighbors<'_> {
+    type Item = Path;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        while let Some(pos) = self.next_pos() {
+            let height = self.valley.get_height(pos);
+            if height as u32 + 1 >= self.path.height as u32 {
+                return Some(Path::new(self.path.length + 1, height, pos));
+            }
+        }
+        None
+    }
+}
+
+struct Valley {
+    map: Vec<Vec<char>>,
+    start: Pos<usize>,
+    exit: Pos<usize>,
+    width: usize,
+}
+
+impl Valley {
+    pub fn parse(lines: &[String]) -> Result<Valley, ValleyError> {
+        let mut map = Vec::new();
+        let mut start = None;
+        let mut exit = None;
+        let mut valley_width = None;
+        for (y, row) in lines.iter().enumerate() {
+            let mut height_row = Vec::new();
+            for (x, height_char) in row.chars().enumerate() {
+                match height_char {
+                    'S' => {
+                        start = Some(Pos::new(x, y));
+                        height_row.push('a')
+                    }
+                    'E' => {
+                        exit = Some(Pos::new(x, y));
+                        height_row.push('z')
+                    }
+                    'a'..='z' => height_row.push(height_char),
+                    _ => return Err(ValleyError::NotALegalCharacter(height_char)),
+                }
+            }
+            if let Some(width) = valley_width {
+                if width != height_row.len() {
+                    return Err(ValleyError::NotAReactangleValley);
+                }
+            } else {
+                valley_width = Some(height_row.len());
+            }
+            map.push(height_row);
+        }
+        let Some(width) = valley_width else {
+            return Err(ValleyError::EmptyValley);
+        };
+        let Some(start) = start else {
+            return Err(ValleyError::NoStartFound);
+        };
+        let Some(exit) = exit else {
+            return Err(ValleyError::NoExitFound);
+        };
+        Ok(Valley {
+            map,
+            start,
+            exit,
+            width,
+        })
+    }
+
+    fn get_height(&self, pos: Pos<usize>) -> char {
+        self.map[pos.y()][pos.x()]
+    }
+
+    fn do_walk<F>(&self, check: F) -> Result<usize, ValleyError>
+    where
+        F: Fn(Pos<usize>) -> bool,
+    {
+        let mut shortest = HashSet::with_capacity(self.width * self.map.len());
+        let mut queue = BinaryHeap::new();
+        queue.push(Path::new(0, 'z', self.exit));
+        while let Some(current) = queue.pop() {
+            if check(current.pos) {
+                return Ok(current.length);
+            }
+            if shortest.contains(&current.pos) {
+                continue;
+            }
+            shortest.insert(current.pos);
+            for next in current.next_path(self) {
+                queue.push(next);
+            }
+        }
+
+        Err(ValleyError::NoPathFound)
+    }
+
+    pub fn walk(&self) -> Result<usize, ValleyError> {
+        self.do_walk(|pos| pos == self.start)
+    }
+
+    pub fn walk_short(&self) -> Result<usize, ValleyError> {
+        self.do_walk(|pos| self.get_height(pos) == 'a')
+    }
+
+    #[inline]
+    fn width(&self) -> usize {
+        self.width
+    }
+
+    #[inline]
+    fn height(&self) -> usize {
+        self.map.len()
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    use crate::common::file::read_lines;
+    use anyhow::Result;
+
+    #[test]
+    fn test_parse() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let valley = Valley::parse(&lines)?;
+        assert_eq!(valley.width, 8);
+        assert_eq!(valley.start, Pos::new(0, 0));
+        assert_eq!(valley.exit, Pos::new(5, 2));
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_part1() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let expected = ResultType::Integer(31);
+        let result = day.part1(&lines)?;
+        assert_eq!(result, expected);
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_part2() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let expected = ResultType::Integer(29);
+        let result = day.part2(&lines)?;
+        assert_eq!(result, expected);
+
+        Ok(())
+    }
+}
diff --git a/src/days/day13/mod.rs b/src/days/day13/mod.rs
new file mode 100644
index 0000000..0e33a74
--- /dev/null
+++ b/src/days/day13/mod.rs
@@ -0,0 +1,220 @@
+use std::cmp::Ordering;
+
+use super::template::{DayTrait, ResultType};
+use itertools::Itertools;
+use thiserror::Error;
+
+const DAY_NUMBER: usize = 13;
+
+pub struct Day;
+
+impl DayTrait for Day {
+    fn get_day_number(&self) -> usize {
+        DAY_NUMBER
+    }
+
+    fn part1(&self, lines: &[String]) -> anyhow::Result<ResultType> {
+        let packets = Packets::parse_all(lines)?;
+        let result: i64 = packets
+            .iter()
+            .tuples()
+            .enumerate()
+            .filter_map(|(pos, (first, second))| {
+                if first < second {
+                    Some(pos as i64 + 1)
+                } else {
+                    None
+                }
+            })
+            .sum();
+        Ok(ResultType::Integer(result))
+    }
+
+    fn part2(&self, lines: &[String]) -> anyhow::Result<ResultType> {
+        let small = Packets::parse("[[2]]")?;
+        let large = Packets::parse("[[6]]")?;
+        let mut pos_small = 1;
+        let mut pos_large = 2;
+        let packets = Packets::parse_all(lines)?;
+        for packet in packets {
+            if packet < small {
+                pos_small += 1;
+                pos_large += 1;
+            } else if packet < large {
+                pos_large += 1;
+            }
+        }
+        Ok(ResultType::Integer(pos_small * pos_large))
+    }
+}
+
+#[derive(Debug, Error)]
+enum PacketError {
+    #[error("Empty Packet not allowed")]
+    EmptyPacketNotAllowed,
+    #[error("Packtet must start with a [ was: {0}")]
+    ExpectedSquare(char),
+    #[error("Unknown char: {0}")]
+    UnknownChar(char),
+    #[error("End of input reached to early")]
+    PrematureEndOfInput,
+    #[error("Number was not terminated correctly")]
+    UnfinishedNumber,
+}
+
+#[derive(Debug, PartialEq, Eq, Clone)]
+enum Packets {
+    Number(u32),
+    List(Vec<Packets>),
+}
+
+impl PartialOrd for Packets {
+    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+        match (self, other) {
+            (Packets::Number(first), Packets::Number(second)) => first.partial_cmp(second),
+            (Packets::List(first), Packets::List(second)) => {
+                for pair in first.iter().zip_longest(second.iter()) {
+                    let result = match pair {
+                        itertools::EitherOrBoth::Left(_) => Some(Ordering::Greater),
+                        itertools::EitherOrBoth::Right(_) => Some(Ordering::Less),
+                        itertools::EitherOrBoth::Both(first, second) => first.partial_cmp(second),
+                    };
+                    if !matches!(result, Some(Ordering::Equal)) {
+                        return result;
+                    }
+                }
+                Some(Ordering::Equal)
+            }
+            (Packets::Number(_), Packets::List(_)) => self.as_list().partial_cmp(other),
+            (Packets::List(_), Packets::Number(_)) => self.partial_cmp(&other.as_list()),
+        }
+    }
+}
+
+impl Packets {
+    pub fn as_list(&self) -> Packets {
+        match self {
+            Packets::Number(_) => Packets::List(vec![self.clone()]),
+            Packets::List(_) => self.clone(),
+        }
+    }
+
+    pub fn parse(line: &str) -> Result<Packets, PacketError> {
+        let mut chars = line.chars();
+        let Some(start) = chars.next() else {
+            return Err(PacketError::EmptyPacketNotAllowed);
+        };
+        if start != '[' {
+            return Err(PacketError::ExpectedSquare(start));
+        }
+        let packet = Packets::parse_one(&mut chars)?;
+        Ok(packet)
+    }
+
+    fn parse_one(chars: &mut dyn Iterator<Item = char>) -> Result<Packets, PacketError> {
+        let mut list = Vec::new();
+        let mut number = None;
+        while let Some(next) = chars.next() {
+            match next {
+                '[' => {
+                    if number.is_some() {
+                        return Err(PacketError::UnfinishedNumber);
+                    }
+                    list.push(Packets::parse_one(chars)?);
+                }
+                ']' => {
+                    if let Some(number) = number {
+                        list.push(Packets::Number(number));
+                    }
+                    return Ok(Packets::List(list));
+                }
+                ',' => {
+                    if let Some(number) = number {
+                        list.push(Packets::Number(number));
+                    }
+                    number = None;
+                }
+                '0'..='9' => match number {
+                    None => number = Some(next.to_digit(10).unwrap()),
+                    Some(prev) => number = Some(prev * 10 + next.to_digit(10).unwrap()),
+                },
+                _ => return Err(PacketError::UnknownChar(next)),
+            }
+        }
+        Err(PacketError::PrematureEndOfInput)
+    }
+
+    pub fn parse_all(lines: &[String]) -> Result<Vec<Packets>, PacketError> {
+        lines
+            .iter()
+            .filter(|line| !line.is_empty())
+            .map(|line| Packets::parse(line))
+            .collect::<Result<Vec<_>, _>>()
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    use crate::common::file::read_lines;
+    use anyhow::Result;
+
+    #[test]
+    fn test_parse() -> Result<()> {
+        let input = "[[1],[2,3]]";
+        let expected = Packets::List(vec![
+            Packets::List(vec![Packets::Number(1)]),
+            Packets::List(vec![Packets::Number(2), Packets::Number(3)]),
+        ]);
+        let result = Packets::parse(input)?;
+        assert_eq!(result, expected);
+        Ok(())
+    }
+
+    #[test]
+    fn test_parse_all() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let result = Packets::parse_all(&lines)?;
+        assert_eq!(result.len(), 16);
+        Ok(())
+    }
+
+    #[test]
+    fn test_compare_all() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let expected = vec![true, true, false, true, false, true, false, false];
+        let result = Packets::parse_all(&lines)?;
+        let compare = result
+            .iter()
+            .tuples()
+            .map(|(first, second)| first < second)
+            .collect::<Vec<_>>();
+        assert_eq!(compare, expected);
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_part1() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let expected = ResultType::Integer(13);
+        let result = day.part1(&lines)?;
+        assert_eq!(result, expected);
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_part2() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let expected = ResultType::Integer(140);
+        let result = day.part2(&lines)?;
+        assert_eq!(result, expected);
+
+        Ok(())
+    }
+}
diff --git a/src/days/day14/mod.rs b/src/days/day14/mod.rs
new file mode 100644
index 0000000..e8ace33
--- /dev/null
+++ b/src/days/day14/mod.rs
@@ -0,0 +1,292 @@
+use itertools::Itertools;
+use std::{collections::HashSet, num::ParseIntError};
+use thiserror::Error;
+
+use crate::common::pos::Pos;
+
+use super::template::{DayTrait, ResultType};
+
+const DAY_NUMBER: usize = 14;
+
+pub struct Day;
+
+impl DayTrait for Day {
+    fn get_day_number(&self) -> usize {
+        DAY_NUMBER
+    }
+
+    fn part1(&self, lines: &[String]) -> anyhow::Result<ResultType> {
+        let cave = Cave::parse(lines)?;
+        Ok(ResultType::Integer(cave.drop_bottomless() as i64))
+    }
+
+    fn part2(&self, lines: &[String]) -> anyhow::Result<ResultType> {
+        let cave = Cave::parse(lines)?;
+        Ok(ResultType::Integer(cave.drop_floor()))
+    }
+}
+
+#[derive(Debug, Error)]
+enum CaveError {
+    #[error("Could not parse")]
+    ParseError,
+
+    #[error("Error, while paring int")]
+    NotAValidInteger(#[from] ParseIntError),
+
+    #[error("Not a valid Pos {0}")]
+    NotAValidPos(String),
+
+    #[error("Found an empty path")]
+    EmptyPath,
+
+    #[error("Found an empty cave")]
+    EmptyCave,
+}
+
+struct Cave {
+    map: Vec<Vec<bool>>,
+    min_x: i32,
+    max_x: i32,
+    height: i32,
+}
+
+impl Cave {
+    fn get(&self, map: &[Vec<bool>], pos: Pos<i32>) -> bool {
+        if pos.y() >= self.height || pos.x() < self.min_x || pos.x() > self.max_x {
+            false
+        } else {
+            map[pos.y() as usize][(pos.x() - self.min_x) as usize]
+        }
+    }
+
+    fn set(&self, map: &mut [Vec<bool>], pos: Pos<i32>) {
+        map[pos.y() as usize][(pos.x() - self.min_x) as usize] = true
+    }
+
+    fn walk(from: Pos<i32>, to: Pos<i32>) -> Result<Vec<Pos<i32>>, CaveError> {
+        if from == to {
+            return Ok(vec![from]);
+        }
+        if from.x() == to.x() {
+            if from.y() < to.y() {
+                Ok((from.y()..to.y()).map(|y| Pos::new(from.x(), y)).collect())
+            } else {
+                Ok(((to.y() + 1)..=from.y())
+                    .map(|y| Pos::new(from.x(), y))
+                    .collect())
+            }
+        } else if from.y() == to.y() {
+            if from.x() < to.x() {
+                Ok((from.x()..to.x()).map(|x| Pos::new(x, from.y())).collect())
+            } else {
+                Ok(((to.x() + 1)..=from.x())
+                    .map(|x| Pos::new(x, from.y()))
+                    .collect())
+            }
+        } else {
+            Err(CaveError::ParseError)
+        }
+    }
+
+    fn parse_one(line: &str) -> Result<HashSet<Pos<i32>>, CaveError> {
+        let corners = line
+            .split("->")
+            .map(|coord| match coord.split(',').collect::<Vec<_>>()[..] {
+                [first, second] => {
+                    let x: i32 = first.trim().parse()?;
+                    let y = second.trim().parse()?;
+                    Ok(Pos::new(x, y))
+                }
+                _ => Err(CaveError::NotAValidPos(coord.to_owned())),
+            })
+            .collect::<Result<Vec<_>, CaveError>>()?;
+
+        if corners.is_empty() {
+            return Err(CaveError::EmptyPath);
+        }
+
+        let blocks = corners
+            .iter()
+            .tuple_windows()
+            .map(|(first, second)| Cave::walk(*first, *second))
+            .collect::<Result<Vec<_>, _>>()?;
+
+        let mut blocks = blocks.iter().flatten().copied().collect::<HashSet<_>>();
+        blocks.insert(*corners.last().unwrap());
+
+        Ok(blocks)
+    }
+
+    pub fn parse(lines: &[String]) -> Result<Cave, CaveError> {
+        let mut cave: HashSet<Pos<i32>> = HashSet::new();
+        for line in lines {
+            cave.extend(Cave::parse_one(line)?.iter());
+        }
+        if cave.is_empty() {
+            Err(CaveError::EmptyCave)
+        } else {
+            let mut max_x = i32::MIN;
+            let mut min_x = i32::MAX;
+            let mut max_y = i32::MIN;
+            for block in &cave {
+                if block.x() < min_x {
+                    min_x = block.x();
+                }
+                if block.x() > max_x {
+                    max_x = block.x();
+                }
+                if block.y() > max_y {
+                    max_y = block.y()
+                }
+            }
+            let mut map = vec![vec![false; (max_x - min_x + 1) as usize]; (max_y + 1) as usize];
+            for block in cave {
+                map[block.y() as usize][(block.x() - min_x) as usize] = true;
+            }
+            Ok(Cave {
+                map,
+                min_x,
+                max_x,
+                height: max_y + 1,
+            })
+        }
+    }
+
+    pub fn drop_bottomless(&self) -> u32 {
+        let mut drops = 0;
+        let mut filled_map = self.map.to_vec();
+
+        while let Some(next) = self.drop_one(&filled_map) {
+            if next.y() <= self.height {
+                drops += 1;
+                self.set(&mut filled_map, next);
+            } else {
+                break;
+            }
+        }
+        drops
+    }
+
+    fn drop_one(&self, map: &[Vec<bool>]) -> Option<Pos<i32>> {
+        let mut drop = Pos::new(500, 0);
+        loop {
+            let next_y = drop.y() + 1;
+            if next_y > self.height {
+                return None;
+            }
+            let mut stuck = true;
+            for dx in [0, -1, 1] {
+                let next = Pos::new(drop.x() + dx, next_y);
+                if !self.get(map, next) {
+                    drop = next;
+                    stuck = false;
+                    break;
+                }
+            }
+
+            if stuck {
+                if drop.y() == 0 {
+                    return None;
+                } else {
+                    return Some(drop);
+                }
+            }
+        }
+    }
+
+    pub fn drop_floor(&self) -> i64 {
+        let last_row = self.height + 1;
+        let mut drops = 1;
+        let mut row = vec![500];
+        let mut left_exceed = None;
+        let mut right_exceed = None;
+        for y in 1..last_row {
+            let mut next_row = Vec::new();
+            for x in row {
+                for dx in [-1, 0, 1] {
+                    let x = x + dx;
+                    if x < self.min_x {
+                        left_exceed = left_exceed.or(Some(y));
+                    } else if x > self.max_x {
+                        right_exceed = right_exceed.or(Some(y));
+                    } else if !next_row.contains(&x)
+                        && (y >= self.height || !self.map[y as usize][(x - self.min_x) as usize])
+                    {
+                        next_row.push(x);
+                    }
+                }
+            }
+            if let Some(left_exceed) = left_exceed {
+                if !next_row.contains(&self.min_x) && (y >= self.height || !self.map[y as usize][0])
+                {
+                    next_row.push(self.min_x);
+                }
+                drops += (y - left_exceed + 1) as i64;
+            }
+            if let Some(right_exceed) = right_exceed {
+                if !next_row.contains(&self.max_x)
+                    && (y >= self.height
+                        || !self.map[y as usize][(self.max_x - self.min_x) as usize])
+                {
+                    next_row.push(self.max_x);
+                }
+                drops += (y - right_exceed + 1) as i64;
+            }
+            drops += next_row.len() as i64;
+            row = next_row
+        }
+        drops
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    use crate::{common::file::read_lines, hashset};
+    use anyhow::Result;
+
+    #[test]
+    fn test_parse() -> Result<()> {
+        let input = "498,4 -> 498,6 -> 496,6";
+        let expected = hashset! {Pos::new(498, 4), Pos::new(498, 5), Pos::new(498, 6), Pos::new(497, 6), Pos::new(496, 6)};
+        let result = Cave::parse_one(input)?;
+        assert_eq!(result, expected);
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_parse_all() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let result = Cave::parse(&lines)?;
+        assert_eq!(result.min_x, 494);
+        assert_eq!(result.max_x, 503);
+        assert_eq!(result.height, 10);
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_part1() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let expected = ResultType::Integer(24);
+        let result = day.part1(&lines)?;
+        assert_eq!(result, expected);
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_part2() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let expected = ResultType::Integer(93);
+        let result = day.part2(&lines)?;
+        assert_eq!(result, expected);
+
+        Ok(())
+    }
+}
diff --git a/src/days/day15/mod.rs b/src/days/day15/mod.rs
new file mode 100644
index 0000000..0614b9e
--- /dev/null
+++ b/src/days/day15/mod.rs
@@ -0,0 +1,317 @@
+use super::template::{DayTrait, ResultType};
+use crate::common::pos::Pos;
+use itertools::Itertools;
+use lazy_static::lazy_static;
+use regex::Regex;
+use std::{collections::HashSet, num::ParseIntError};
+use thiserror::Error;
+
+const DAY_NUMBER: usize = 15;
+
+pub struct Day;
+
+impl DayTrait for Day {
+    fn get_day_number(&self) -> usize {
+        DAY_NUMBER
+    }
+
+    fn part1(&self, lines: &[String]) -> anyhow::Result<ResultType> {
+        let row = lines[0].parse()?;
+        let (sensors, beacons) = Day::parse_all(&lines[1..])?;
+        let result = Day::count_coverage_at(&sensors, &beacons, row);
+        Ok(ResultType::Integer(result))
+    }
+
+    fn part2(&self, lines: &[String]) -> anyhow::Result<ResultType> {
+        let (sensors, _) = Day::parse_all(&lines[1..])?;
+        let mid_lines = Day::dividing_lines(&sensors);
+        let points = mid_lines
+            .iter()
+            .tuple_combinations()
+            .filter_map(|(first, second)| first.cross(second))
+            .filter(|pos| sensors.iter().all(|sensor| !sensor.contains(pos)))
+            .dedup()
+            .collect::<Vec<_>>();
+
+        if points.len() != 1 {
+            Err(SensorError::NotExactlyOneResult(points.len()))?;
+        }
+
+        let point = points.first().unwrap();
+        Ok(ResultType::Integer(point.x() * 4000000 + point.y()))
+    }
+}
+
+impl Day {
+    fn parse_all(lines: &[String]) -> Result<(HashSet<Sensor>, HashSet<Pos<i64>>), SensorError> {
+        let mut sensors = HashSet::new();
+        let mut beacons = HashSet::new();
+        for line in lines {
+            let (sensor, beacon) = Sensor::parse(line)?;
+            sensors.insert(sensor);
+            beacons.insert(beacon);
+        }
+        Ok((sensors, beacons))
+    }
+
+    fn count_coverage_at(sensors: &HashSet<Sensor>, beacons: &HashSet<Pos<i64>>, row: i64) -> i64 {
+        let ranges = sensors
+            .iter()
+            .filter_map(|sensor| sensor.range_at(row))
+            .collect::<Vec<_>>();
+        let merged: i64 = Range::merge_all(&ranges)
+            .iter()
+            .map(|range| range.width())
+            .sum();
+        let sensors = sensors
+            .iter()
+            .filter(|sensor| sensor.pos.y() == row)
+            .count() as i64;
+        let beacons = beacons.iter().filter(|beacons| beacons.y() == row).count() as i64;
+
+        merged - (sensors + beacons)
+    }
+
+    fn dividing_lines(sensors: &HashSet<Sensor>) -> Vec<Line> {
+        sensors
+            .iter()
+            .tuple_combinations()
+            .filter_map(|(first, second)| Line::create(first, second))
+            .collect()
+    }
+}
+
+#[derive(Debug, Error)]
+enum SensorError {
+    #[error("Not an Integer")]
+    NotAnInt(#[from] ParseIntError),
+
+    #[error("Unknown line: {0}")]
+    UnknownLine(String),
+
+    #[error("Did not find exactly one point for the sensor: {0}")]
+    NotExactlyOneResult(usize),
+}
+
+#[derive(Debug)]
+struct Line {
+    start: Pos<i64>,
+    is_up: bool,
+    steps: i64,
+}
+
+impl Line {
+    pub fn create(first: &Sensor, second: &Sensor) -> Option<Line> {
+        if first.border_distance(second) != 2 {
+            return None;
+        }
+
+        let (one, two) = if first.pos.x() < second.pos.x() {
+            (first, second)
+        } else {
+            (second, first)
+        };
+
+        let start;
+        let is_up;
+        if one.pos.y() < two.pos.y() {
+            is_up = true;
+            if one.pos.y() + one.radius <= two.pos.y() {
+                start = Pos::new(one.pos.x(), one.pos.y() + one.radius + 1);
+            } else {
+                start = Pos::new(two.pos.x() - two.radius - 1, two.pos.y());
+            }
+        } else {
+            is_up = false;
+            if one.pos.y() - one.radius >= two.pos.y() {
+                start = Pos::new(one.pos.x(), one.pos.y() - one.radius - 1);
+            } else {
+                start = Pos::new(two.pos.x() - two.radius - 1, two.pos.y());
+            }
+        }
+        let steps = two.pos.x().min(one.pos.x() + one.radius) - start.x();
+
+        Some(Line {
+            start,
+            is_up,
+            steps,
+        })
+    }
+
+    fn cross(&self, other: &Line) -> Option<Pos<i64>> {
+        if self.is_up == other.is_up {
+            return None;
+        }
+        let (bottom_up, top_down) = if self.is_up {
+            (self, other)
+        } else {
+            (other, self)
+        };
+
+        let r2 =
+            bottom_up.start.x() + bottom_up.start.y() - (top_down.start.x() + top_down.start.y());
+        if r2 % 2 != 0 {
+            return None;
+        }
+
+        let r = r2 / 2;
+        if r < 0 || r > top_down.steps {
+            return None;
+        }
+
+        let pos = top_down.start + Pos::splat(r);
+        Some(pos)
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
+struct Range(i64, i64);
+
+impl Range {
+    fn overlaps(&self, other: &Range) -> bool {
+        self.0 <= other.1 && other.0 <= self.1
+    }
+
+    pub fn width(&self) -> i64 {
+        self.1 - self.0 + 1
+    }
+
+    pub fn merge_all(ranges: &[Range]) -> Vec<Range> {
+        let mut ranges: Vec<Range> = ranges.iter().sorted().copied().collect();
+        assert!(!ranges.is_empty());
+        loop {
+            let mut next = vec![];
+            let mut merged = false;
+            let mut current = ranges[0];
+            for range in &ranges[1..] {
+                if current.overlaps(range) {
+                    current = Range(current.0, current.1.max(range.1));
+                    merged = true;
+                } else {
+                    next.push(current);
+                    current = *range;
+                }
+            }
+            next.push(current);
+
+            if merged {
+                ranges = next;
+            } else {
+                return next;
+            }
+        }
+    }
+}
+
+#[derive(Debug, PartialEq, Eq, Copy, Clone, Hash)]
+struct Sensor {
+    pos: Pos<i64>,
+    radius: i64,
+}
+
+lazy_static! {
+    static ref SENSOR: Regex = Regex::new(r"x=(-?\d+), y=(-?\d+).*x=(-?\d+), y=(-?\d+)").unwrap();
+}
+
+impl Sensor {
+    pub fn parse(line: &str) -> Result<(Sensor, Pos<i64>), SensorError> {
+        let caps = SENSOR
+            .captures(line)
+            .ok_or(SensorError::UnknownLine(line.to_owned()))?;
+        let sensor_x = caps.get(1).unwrap().as_str().parse()?;
+        let sensor_y = caps.get(2).unwrap().as_str().parse()?;
+        let beacon_x = caps.get(3).unwrap().as_str().parse()?;
+        let beacon_y = caps.get(4).unwrap().as_str().parse()?;
+        let sensor = Pos::new(sensor_x, sensor_y);
+        let beacon = Pos::new(beacon_x, beacon_y);
+        let radius = sensor.taxicab(&beacon);
+        Ok((
+            Sensor {
+                pos: sensor,
+                radius,
+            },
+            beacon,
+        ))
+    }
+
+    pub fn range_at(&self, y: i64) -> Option<Range> {
+        let distance = (self.pos.y() - y).abs();
+        if distance > self.radius {
+            None
+        } else {
+            let extent = self.radius - distance;
+            Some(Range(self.pos.x() - extent, self.pos.x() + extent))
+        }
+    }
+
+    pub fn border_distance(&self, other: &Sensor) -> i64 {
+        let distance = self.pos.taxicab(&other.pos);
+        distance - self.radius - other.radius
+    }
+
+    pub fn contains(&self, pos: &Pos<i64>) -> bool {
+        self.pos.taxicab(pos) <= self.radius
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    use crate::common::file::read_lines;
+    use anyhow::Result;
+    #[test]
+    fn test_parse() -> Result<()> {
+        let input = "Sensor at x=2, y=18: closest beacon is at x=-2, y=15";
+        let expected = (
+            Sensor {
+                pos: Pos::new(2, 18),
+                radius: 7,
+            },
+            Pos::new(-2, 15),
+        );
+        let result = Sensor::parse(input)?;
+        assert_eq!(result, expected);
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_width() {
+        let sensor = Sensor {
+            pos: Pos::new(8, 7),
+            radius: 9,
+        };
+        assert_eq!(sensor.range_at(17), None);
+        assert_eq!(sensor.range_at(7), Some(Range(-1, 17)));
+        assert_eq!(sensor.range_at(10), Some(Range(2, 14)));
+    }
+
+    #[test]
+    fn test_merge() {
+        let input = vec![Range(4, 10), Range(1, 3), Range(5, 9), Range(8, 12)];
+        let expected = vec![Range(1, 3), Range(4, 12)];
+        assert_eq!(Range::merge_all(&input), expected);
+    }
+
+    #[test]
+    fn test_part1() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let expected = ResultType::Integer(26);
+        let result = day.part1(&lines)?;
+        assert_eq!(result, expected);
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_part2() -> Result<()> {
+        let day = Day {};
+        let lines = read_lines(day.get_day_number(), "example01.txt")?;
+        let expected = ResultType::Integer(56000011);
+        let result = day.part2(&lines)?;
+        assert_eq!(result, expected);
+
+        Ok(())
+    }
+}
diff --git a/src/days/mod.rs b/src/days/mod.rs
index 348e9be..e93a410 100644
--- a/src/days/mod.rs
+++ b/src/days/mod.rs
@@ -4,6 +4,15 @@ mod day03;
 mod day04;
 mod day05;
 mod day06;
+mod day07;
+mod day08;
+mod day09;
+mod day10;
+mod day11;
+mod day12;
+mod day13;
+mod day14;
+mod day15;
 mod template;
 
 pub use template::DayTrait;
@@ -13,7 +22,7 @@ pub mod day_provider {
     use super::*;
     use thiserror::Error;
 
-    const MAX_DAY: usize = 6;
+    const MAX_DAY: usize = 15;
 
     pub fn get_day(day_num: usize) -> Result<Box<dyn DayTrait>, ProviderError> {
         match day_num {
@@ -23,6 +32,15 @@ pub mod day_provider {
             4 => Ok(Box::new(day04::Day)),
             5 => Ok(Box::new(day05::Day)),
             6 => Ok(Box::new(day06::Day)),
+            7 => Ok(Box::new(day07::Day)),
+            8 => Ok(Box::new(day08::Day)),
+            9 => Ok(Box::new(day09::Day)),
+            10 => Ok(Box::new(day10::Day)),
+            11 => Ok(Box::new(day11::Day)),
+            12 => Ok(Box::new(day12::Day)),
+            13 => Ok(Box::new(day13::Day)),
+            14 => Ok(Box::new(day14::Day)),
+            15 => Ok(Box::new(day15::Day)),
             _ => Err(ProviderError::InvalidNumber(day_num)),
         }
     }
diff --git a/src/main.rs b/src/main.rs
index ff4cd7f..7e90532 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -40,7 +40,7 @@ fn output(day: usize, part: usize, result: ResultType, time: Duration) {
                 time.as_secs_f32()
             );
             for line in &value[1..] {
-                println!("       part  : {line}");
+                println!("               {line}");
             }
         }
         ResultType::Nothing => {}