day25 finished

advent/days/day25/data/example01.txt

@@ -0,0 +1,13 @@
+1=-0-2
+12111
+2=0=
+21
+2=01
+111
+20012
+112
+1=-1=
+1-12
+12
+1=
+122

advent/days/day25/data/input.txt

@@ -0,0 +1,143 @@
+1=0=01=0=2111-1211
+1==21=
+20--
+1-=1200=-=0
+211==12=2=0111==
+2=-10
+1221=221=0-1=-
+12=02=-12020=12=01-
+12112101
+20
+120120=21=1002-1
+10==1-02=1
+1=11200001-=--
+1=222-1=012=2
+20===1-1102-=
+1020
+102=-==-=2-
+112-2112-00012-
+1010=--121
+202022=-=2-22=
+122==1=1020011=-00
+10212==-0
+2=--12020=1-0=-2=-
+1110-1-2
+20==210221=-21--12
+1=-02--=22=-122
+2=-=0=00=1--1-2=--
+2==2==2-
+2=12=1
+2=01=
+202=20202-000
+1=0-=020021022012
+2=0-011-=2=-0-=21
+1=211
+1-=1=11=--010=---
+1000020-12==
+2-=122-1211-0=
+10=2220122012
+2=21-01=212
+10111==2=2-12
+111
+1=2---2211=2011=--
+1--=0000=1-020
+2=02-=-
+1-011=
+12020-0=-1-220100
+2-==000=21=1
+2-0100000-12-2-=
+1-=1
+1221=2-1==02-=202
+200
+122-2-0
+10=2101-22
+1==-120-1
+2=2=2=-11--==-==
+2111-=2=-=-2
+1--
+1-0=10-0112-12=
+10=
+2=01=1=-=20=
+1=
+1211-2=-1=
+222=
+122=2-1-0
+1-2=20-=02122-1
+1==-=2===0-=1100--11
+12-0=201=10=-=
+1=01=2=22-2-1-1
+120==222100=0
+11=-=--12=2-1101
+102=1221=---0==021
+2-=-2=202-=-==
+100=1=02020-221=
+1=0=-220=
+1001-
+20==2==1-1
+1=2-2=2=-12=
+10=0--2
+10-202-2002=22=
+2=2=
+1-011=0=-12---
+1002220
+2=
+1--=2---111
+222==2
+11100
+1=0=201
+1--02-
+1=11-==0=021
+1-=00=
+1==12-20-=002001=
+1=0=-=21-
+1000-1=0-0=1=01-2-
+2==
+1-0
+1=101-0-1
+1=0=
+11=2==-0-2202-0=
+10-0=0=1-002
+1-=0210=01120-
+1112=2-0-2=-01
+1-1=022=21
+2=1-2--120
+10002--0=220-0-2=12
+11002102100
+11000-2-12
+120=-==1-2-=
+21
+11
+2=121-
+1==
+1=-
+1-=--2=-
+2=-10-=0
+2200-1-
+2=21-1200==
+1-102210=002=--112
+1-10
+122=202=201-=-10-1
+2212121=02102
+21=2-211=-1-20-
+101-=01-1
+200012112=
+22=21201=22
+1-1212=1-=1
+1212-==1=01
+22==--=
+1=-2-1-==020-10-=
+1=1210=--00
+1=--=1=
+2010111-00111-2=2
+11=21-0=2-01
+21=
+1=-0-220
+102-=0
+1=---0-
+1-1122-=121222--0
+10110=1-20--1-1
+20=--21220-=
+1=---22-
+2-000===1101=
+20-
+10==

advent/days/day25/solution.py

@@ -0,0 +1,33 @@
+from __future__ import annotations
+
+from typing import Iterator
+
+day_num = 25
+
+
+def part1(lines: Iterator[str]) -> str:
+    snafu = sum(from_snafu(line) for line in lines)
+    return to_snafu(snafu)
+
+
+def part2(lines: Iterator[str]) -> None:
+    return None
+
+
+SNAFU = "=-012"
+
+
+def from_snafu(line: str) -> int:
+    result = 0
+    for char in line:
+        result = result * 5 + SNAFU.index(char) - 2
+    return result
+
+
+def to_snafu(number: int) -> str:
+    result = ""
+    while number > 0:
+        mod = (number + 2) % 5
+        result = SNAFU[mod] + result
+        number = (number - mod + 2) // 5
+    return result

advent/days/day25/test_solution.py

@@ -0,0 +1,31 @@
+from advent.common import input
+
+from .solution import day_num, part1, part2, from_snafu, to_snafu
+
+
+def test_part1():
+    lines = input.read_lines(day_num, 'example01.txt')
+    expected = "2=-1=0"
+    result = part1(lines)
+    assert result == expected
+
+
+def test_part2():
+    lines = input.read_lines(day_num, 'example01.txt')
+    expected = None
+    result = part2(lines)
+    assert result == expected
+
+
+def test_976():
+    input = "2=-01"
+    expected = 976
+    result = from_snafu(input)
+    assert result == expected
+
+
+def test_4890():
+    input = 4890
+    expected = "2=-1=0"
+    result = to_snafu(input)
+    assert result == expected