day24 finished
This commit is contained in:
Ruediger Ludwig
parent
db1d74d201
commit
b5f193ff3c
6 changed files with 419 additions and 0 deletions
0
advent/days/day24/__init__.py
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advent/days/day24/__init__.py
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advent/days/day24/data/example01.txt
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advent/days/day24/data/example01.txt
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#.######
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#>>.<^<#
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#.<..<<#
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#>v.><>#
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#<^v^^>#
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######.#
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advent/days/day24/data/expected01_01.txt
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advent/days/day24/data/expected01_01.txt
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#.######
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#.>3.<.#
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#<..<<.#
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#>2.22.#
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#>v..^<#
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######.#
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advent/days/day24/data/input.txt
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advent/days/day24/data/input.txt
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#.######################################################################################################################################################
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#<v^>^>^^<><^>^^v>vv^v^>>^<>^<v<>v^>>v>v><^..><v<^v<<^v>v>>>>^<v^>>>.v>.v><<v><.^>>^^^>v>>^.<v>>vv<<.<<v<<vv^<^>^v>^v<>^^.^.<<<v^>>^<^>.>vvv><^<^>v.^<>#
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#<..v<<^^.^^v<<>>v<vv.><v<<<>>>.<>>^vv^^v>v^>><v<.<<v.v^^>>v^vv<<><>>v.>.v>.<..v>^^>^<<vv>><>vv>>v>.><.<<vv<v^..v<v<v^v>v^vv<v<v^.^<v<.<<><>vvvvv^<^v>.#
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#<>>^<v>v^v>v>.^v<>v<v^<<<.^^<.>vv>>^<<^>>v<v.>^^^.<<<.>>v.>.v^<v><v>.>>>^><>v>>v^<.v^<.vv^>^v<><>>v^^<^>..<v><<^<<<^<v><^>^<>v>vvv>>^<<>><><<^^.<<v>v>#
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#>.<<<^..>><>v>^vv>vv<v..^>^^>>.><^<v.>>><^.^<>^v>.<^<>>>^>>^><^><^.^>.><><><^>^>>^>>>^<.>>^<^>vv<^v^><vv^v>.>^>>vv.^<>>^>>>><>.^.>v<.^<>v^>v>^^>>v<><>#
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#>>v<^v^<^^><>><>.>v^v>^v.>v^.>>.><><<>^><<>^>^v>v^^^>>^v<<<>v<vv>v>>v<^^^<<<<v^vv><>v<^>>.<v.^^>^v<v<v.v..v<^^>>><.v^<.>>vv>v><><.^^^v><.<<v^>^>>><v><#
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#>>vv<^vv<<v<^v^.><>^<v<>v<^v.>>v<><>.>^.^....<<^<.<v>><v>^^^<><>.>^<<v^<>>>^^><v><>>v^v<v<v^<.^<v>v^<>v^<vv^.<^v>^^^v.<><^><^v<<.v>>><>>><.v>v>>^.^>^>#
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#<v<>>^v>v^vv^.^<<<^><>v^<.>>^^^<^<^>.>>^<<.^>><<<v^v>.>^^.vv>.v<v^>v><^^.<<<v^>v..<^<.vvv<.<v..<.>.v>.>>^v<^^<^v^>^.<<^^.^^<><v^^v<^^^v>v<<<<v<<>v>><>#
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#<^>>^>><<>v.v>.vvv><^><v<^v<>v..<<<>>><<vv>^v><^>..<^^v>.<<<v><v^^vv^^>>.v..^<.^v<v>v.><vv>^><>vv><<>v^>v>><^^>^>><^>.>^^<<><><^.>^v<>v^.>v><>>.v^..v>#
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#<.<<<^><><^<<^>><..>^<<<>^.<>>v..v^^<<<.><.^.<^>^vvv^^^^>v>^<v>>>>>v<><>v.<>>^.<>v^<.^vv>v^<v>.><v<^.><<^vv<>><>v><^v>>^^^.v^v>v>^v^>.v<<^>.^v<v>^>vv<#
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#<<>^^.^>v<vvvv<<^v<v<<<v>.<>>^>^.<<^>^><<>v^.><<<.^^^<<^><<^^>.>vv<v<>>^>^^v<.^>.<v<>^>^<^>^.<>^v.^^^.v><v>^.^v^<<<><<>v.>>>>^<v>..v>^^v<v<^>v<v.>^v>>#
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#<^.<^^><>^^^<<>>^>.^^^<^<^<^^<^v.^^v>^v<>.^v^^<<..v<^<>>^<..<^.>><v<>^>.^v.>>v^.v..v.<<vv^>^vvv^v<vv<^.^><><><<^v^v.^^<<>^vv>^^>v>^v<<^>^<vvv.><^.^<v>#
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#<^^v^v>^<^><>v><.><v>^>^<vv<>..v^>^v^>^><>v<^v^<<v<<<<v<v..^^^<><v>v>^vv<^v.<><>vv>>>>v<>^vv<^v<>^^.v>>^^<<.<^<v<>>^>>vv>vv^<v^^>>^<v<.v<v>v<<>.>^>^v>#
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#<<>>>.<<>^>>v>^<^v>><<^v<><<.^<^<>>><^v>>v>^<^vv.<^^^.vv^<<<>^^>v>^v.>^^v>v.<>vvv><<v>v>^v.<v^<>^>vv<><vv<v^<><vv.>^>.>.v^v.v^vv^<.<>.>vv>^>v<v<v>^<.<#
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#>^<^<v<^^<^^v><<.<<..>>.>^^v>>v>^^>^^>>>v>v^<v^><>v>><v^<v>^>vvv>><>>vv>.>^.^<>.><v.>^.v<><v<^v><v.v<v<..^>^^<^v^>>.>v.v<><<<v><>^<<^>^>^>^.vv..<>v<^>#
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#..v<<^v^^>^>^<^<vvv>v<v^^v^.<<vvv.v.v^v>^v^^v>><^><<^v.<vv<><.vv^v<<>^v<<^v^v^^.>^>v<^^v...>>vv.<^v>v^<<^<vv>v^>v<^>v<vv>^<>.>v^^^^.^<>^^.^><.<.>>.><.#
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#<vv>v^<v^.vv<<.>v<<^v^>>^vv.v>>v>.vv^>>vv.>v>>>^.>>><.^.^<><>^vv<^<>><<vv<<v>^v^>>.<v^<v^<^^^<><>v<>v<....^^><.<^^>v^v>v<v<.><<>>^<>.v.<.vv<.>^.^v^>.>#
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#<<v<^vv^>v>>^>.>^^^<.>>^<><>>.>^v^<.v^^.^<<^>^.^v^^v<v<><>>.>.<>.^.v>.<v>^><^>v>v<>.^v<><.<<.><<^v<><><^>v^...v<<^^<^>v>^^vv^^vvv>^>v>>.>>v^^.vv>^<v<>#
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#>v<>^v><>^>>><<^.^v<<v^>v<>>>.^v><^v<<>v<^^.<.><><v>^<><.v<v<<^^^>>><^>^>>.<>vvvv.^^v<<>^<>>><<v^v><v>>>^v.<^>.^>><v><<><vv.v<vv<v^^>v<.<^<^>v^^>v^.><#
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#><v>vv^<^.<^>v^v^<><><vvv^v>v<>>v^<>^>>>^v^<v>>v<<^.^<v^vvv^^<><vvv.<vv^.>>v^<v.^vv><vv<>v^<^<^^>^^^vv^.<><>><^v.<^<.<>.>^<^<^<>v<^.<v<v<v>^vv><.v<^>>#
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#>v^.v>^v<>>v^>>>^^^^>.v<<^>^v>.^^>^>v^<^v^^<^^v>v>.v^<v>^v><^^.><^^>>v>v^v<v.<^>><>vv><v^v^><>^vvv>>v>>^v^^<^>>v^<^vv^<^^^^vv<><vv<.v^><v>^^>v^v<><<<<#
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######################################################################################################################################################.#
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advent/days/day24/solution.py
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advent/days/day24/solution.py
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from __future__ import annotations
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from dataclasses import dataclass, field
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from enum import IntEnum
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from queue import PriorityQueue
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from typing import Iterator
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day_num = 24
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def part1(lines: Iterator[str]) -> int:
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valley = Valley.parse(lines)
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return valley.find_way(1)
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def part2(lines: Iterator[str]) -> int:
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valley = Valley.parse(lines)
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return valley.find_way(3)
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def gcd(num1: int, num2: int) -> int:
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assert num1 >= 0 and num2 >= 0
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if num1 == 0 or num2 == 0:
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return 0
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while num2 != 0:
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num1, num2 = num2, num1 % num2
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return num1
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def lcm(num1: int, num2: int) -> int:
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return num1 * num2 // gcd(num1, num2)
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Position = tuple[int, int]
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BlizList = list[Position]
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BlizTuple = tuple[BlizList, BlizList, BlizList, BlizList]
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class Direction(IntEnum):
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East = 0
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North = 1
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West = 2
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South = 3
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@classmethod
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def create(cls, char: str) -> Direction:
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match char:
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case '>': return Direction.East
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case '^': return Direction.North
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case '<': return Direction.West
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case 'v': return Direction.South
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case _: raise Exception("Illegal Direction")
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def position(self) -> Position:
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match self:
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case Direction.East: return 1, 0
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case Direction.North: return 0, -1
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case Direction.West: return -1, 0
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case Direction.South: return 0, 1
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@property
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def char(self) -> str:
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match self:
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case Direction.East: return ">"
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case Direction.North: return "^"
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case Direction.West: return "<"
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case Direction.South: return "v"
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@dataclass(slots=True, frozen=True)
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class Weather:
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blizzards: list[dict[Position, str]] = field(repr=False)
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extent: Position
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repeat: int
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def print(self, time: int) -> list[str]:
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current = self.blizzards[self.normal_time(time)]
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lines: list[str] = []
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for row in range(self.extent[1]):
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line = ""
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for col in range(self.extent[0]):
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if (char := current.get((col, row))) is not None:
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line += char
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else:
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line += '.'
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lines.append(line)
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return lines
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def normal_time(self, time: int) -> int:
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return time % self.repeat
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def get(self, time: int) -> dict[Position, str]:
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return self.blizzards[time % self.repeat]
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@classmethod
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def predict_weather(cls, blizzards: BlizTuple, extent: Position) -> Weather:
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repeat = lcm(extent[0], extent[1])
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weather: list[dict[Position, str]] = [Weather.create_dict(blizzards)]
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for _ in range(repeat - 1):
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blizzards = Weather.progress_blizzards(blizzards, extent)
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weather.append(Weather.create_dict(blizzards))
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return Weather(weather, extent, repeat)
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@classmethod
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def move_east(cls, blizzards: BlizList, extent: Position) -> BlizList:
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add = Direction.East.position()
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result: BlizList = []
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for pos in blizzards:
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next_pos = pos[0] + add[0], pos[1] + add[1]
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if next_pos[0] >= extent[0]:
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next_pos = 0, next_pos[1]
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result.append(next_pos)
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return result
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@classmethod
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def move_west(cls, blizzards: BlizList, extent: Position) -> BlizList:
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add = Direction.West.position()
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result: BlizList = []
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for pos in blizzards:
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next_pos = pos[0] + add[0], pos[1] + add[1]
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if next_pos[0] < 0:
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next_pos = extent[0] - 1, next_pos[1]
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result.append(next_pos)
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return result
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@classmethod
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def move_south(cls, blizzards: BlizList, extent: Position) -> BlizList:
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add = Direction.South.position()
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result: BlizList = []
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for pos in blizzards:
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next_pos = pos[0] + add[0], pos[1] + add[1]
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if next_pos[1] >= extent[1]:
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next_pos = next_pos[0], 0
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result.append(next_pos)
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return result
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@classmethod
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def move_north(cls, blizzards: BlizList, extent: Position) -> BlizList:
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add = Direction.North.position()
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result: BlizList = []
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for pos in blizzards:
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next_pos = pos[0] + add[0], pos[1] + add[1]
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if next_pos[1] < 0:
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next_pos = next_pos[0], extent[1] - 1
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result.append(next_pos)
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return result
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@classmethod
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def _add_list(cls, map: dict[Position, str], lst: BlizList, char: str) -> dict[Position, str]:
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for position in lst:
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match map.get(position):
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case None: map[position] = char
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case '2': map[position] = '3'
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case '3': map[position] = '4'
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case _: map[position] = '2'
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return map
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@classmethod
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def create_dict(cls, blizzards: BlizTuple) -> dict[Position, str]:
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map = Weather._add_list({}, blizzards[0], Direction.East.char)
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map = Weather._add_list(map, blizzards[1], Direction.North.char)
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map = Weather._add_list(map, blizzards[2], Direction.West.char)
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return Weather._add_list(map, blizzards[3], Direction.South.char)
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@classmethod
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def progress_blizzards(cls, blizzards: BlizTuple, extent: Position) -> BlizTuple:
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return (
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Weather.move_east(blizzards[0], extent),
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Weather.move_north(blizzards[1], extent),
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Weather.move_west(blizzards[2], extent),
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Weather.move_south(blizzards[3], extent),
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)
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@dataclass(slots=True, frozen=True)
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class Valley:
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weather: Weather = field(repr=False)
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extent: Position
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start: Position
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exit: Position
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@classmethod
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def append(cls, blizzards: BlizTuple, direction: Direction, position: Position) -> BlizTuple:
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return tuple(
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directed if num != direction else directed + [position]
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for num, directed in enumerate(blizzards)
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)
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@classmethod
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def _get_wallbreak(cls, lines: str) -> int:
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for col, tile in enumerate(lines[1:]):
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if tile == '.':
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return col
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raise Exception("No break in the wall")
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@classmethod
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def parse_line(cls, blizzards: BlizTuple, line: str, row: int) -> BlizTuple:
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for col, char in enumerate(line[1:]):
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match char:
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case '#':
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return blizzards
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case '>' | '^' | '<' | 'v':
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blizzards = Valley.append(blizzards, Direction.create(char), (col, row))
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case '.':
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pass
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case _:
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raise Exception("Unknown char: {char}")
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raise Exception("line not terminated by wall")
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@classmethod
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def parse(cls, lines: Iterator[str]) -> Valley:
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first_line = next(lines)
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start_col = Valley._get_wallbreak(first_line)
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width = len(first_line) - 2
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blizzards: BlizTuple = [], [], [], []
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for row, line in enumerate(lines):
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if line.startswith("##"):
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end_col = Valley._get_wallbreak(line)
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extent = width, row
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return Valley(Weather.predict_weather(blizzards, extent), extent,
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(start_col, -1), (end_col, row))
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else:
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blizzards = Valley.parse_line(blizzards, line, row)
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assert False, "Unreachable"
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def __str__(self) -> str:
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return '\n'.join(self.print(0))
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def print(self, time: int) -> list[str]:
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first = '#' + ('#' * self.start[0]) + '.' + ('#' * (self.extent[0] - self.start[0]))
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last = '#' + ('#' * self.exit[0]) + '.' + ('#' * (self.extent[0] - self.exit[0]))
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lines = self.weather.print(time)
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lines = [first] + ['#' + line + '#' for line in lines] + [last]
|
||||||
|
return lines
|
||||||
|
|
||||||
|
def find_way(self, rounds: int) -> int:
|
||||||
|
queue: PriorityQueue[Step] = PriorityQueue()
|
||||||
|
queue.put(Step(
|
||||||
|
position=self.start,
|
||||||
|
time=0,
|
||||||
|
round=0,
|
||||||
|
valley=self,
|
||||||
|
start=self.start,
|
||||||
|
target=self.exit))
|
||||||
|
reached: set[tuple[Position, int, int]] = set()
|
||||||
|
while not queue.empty():
|
||||||
|
current = queue.get()
|
||||||
|
if current.round == rounds:
|
||||||
|
return current.time
|
||||||
|
|
||||||
|
normal_time = self.weather.normal_time(current.time)
|
||||||
|
if (current.position, normal_time, current.round) in reached:
|
||||||
|
continue
|
||||||
|
|
||||||
|
reached.add((current.position, normal_time, current.round))
|
||||||
|
for next in current.possible_moves():
|
||||||
|
queue.put(next)
|
||||||
|
|
||||||
|
raise Exception("No path found")
|
||||||
|
|
||||||
|
|
||||||
|
@dataclass(slots=True, kw_only=True)
|
||||||
|
class Step:
|
||||||
|
position: Position
|
||||||
|
time: int
|
||||||
|
round: int
|
||||||
|
start: Position
|
||||||
|
target: Position
|
||||||
|
valley: Valley
|
||||||
|
|
||||||
|
def __lt__(self, other: Step) -> bool:
|
||||||
|
return self.time < other.time
|
||||||
|
|
||||||
|
def __str__(self) -> str:
|
||||||
|
return '\n'.join(self.print())
|
||||||
|
|
||||||
|
def print(self) -> list[str]:
|
||||||
|
lines = self.valley.print(self.time)
|
||||||
|
|
||||||
|
line = lines[self.position[1] + 1]
|
||||||
|
lines[self.position[1] + 1] = line[:self.position[0] + 1] + \
|
||||||
|
'E' + line[self.position[0] + 2:]
|
||||||
|
|
||||||
|
return lines
|
||||||
|
|
||||||
|
def reach_target(self) -> Step:
|
||||||
|
path = Step(position=self.target,
|
||||||
|
time=self.time + 1,
|
||||||
|
round=self.round + 1,
|
||||||
|
valley=self.valley,
|
||||||
|
start=self.target,
|
||||||
|
target=self.start,
|
||||||
|
)
|
||||||
|
return path
|
||||||
|
|
||||||
|
def move(self, position: Position) -> Step:
|
||||||
|
return Step(position=position,
|
||||||
|
time=self.time + 1,
|
||||||
|
round=self.round,
|
||||||
|
valley=self.valley,
|
||||||
|
start=self.start,
|
||||||
|
target=self.target,
|
||||||
|
)
|
||||||
|
|
||||||
|
def wait(self) -> Step:
|
||||||
|
return Step(position=self.position,
|
||||||
|
time=self.time + 1,
|
||||||
|
round=self.round,
|
||||||
|
valley=self.valley,
|
||||||
|
start=self.start,
|
||||||
|
target=self.target,
|
||||||
|
)
|
||||||
|
|
||||||
|
def possible_moves(self) -> Iterator[Step]:
|
||||||
|
impassable = self.valley.weather.get(self.time + 1)
|
||||||
|
|
||||||
|
if self.position not in impassable:
|
||||||
|
yield self.wait()
|
||||||
|
|
||||||
|
for dir in Direction:
|
||||||
|
add = dir.position()
|
||||||
|
next_position = self.position[0] + add[0], self.position[1] + add[1]
|
||||||
|
if next_position == self.target:
|
||||||
|
yield self.reach_target()
|
||||||
|
|
||||||
|
elif (0 <= next_position[0] < self.valley.extent[0]
|
||||||
|
and 0 <= next_position[1] < self.valley.extent[1]):
|
||||||
|
if next_position not in impassable:
|
||||||
|
yield self.move(next_position)
|
||||||
49
advent/days/day24/test_solution.py
Normal file
49
advent/days/day24/test_solution.py
Normal file
|
|
@ -0,0 +1,49 @@
|
||||||
|
from advent.common import input
|
||||||
|
|
||||||
|
from .solution import BlizTuple, Valley, day_num, part1, part2
|
||||||
|
|
||||||
|
|
||||||
|
def test_part1():
|
||||||
|
lines = input.read_lines(day_num, 'example01.txt')
|
||||||
|
expected = 18
|
||||||
|
result = part1(lines)
|
||||||
|
assert result == expected
|
||||||
|
|
||||||
|
|
||||||
|
def test_part2():
|
||||||
|
lines = input.read_lines(day_num, 'example01.txt')
|
||||||
|
expected = 54
|
||||||
|
result = part2(lines)
|
||||||
|
assert result == expected
|
||||||
|
|
||||||
|
|
||||||
|
def test_parse_line():
|
||||||
|
input = "#>>.<^<#"
|
||||||
|
expected: BlizTuple = (
|
||||||
|
[(0, 0), (1, 0)],
|
||||||
|
[(4, 0)],
|
||||||
|
[(3, 0), (5, 0)],
|
||||||
|
[])
|
||||||
|
result = Valley.parse_line(([], [], [], []), input, 0)
|
||||||
|
assert result == expected
|
||||||
|
|
||||||
|
|
||||||
|
def test_walk():
|
||||||
|
lines = input.read_lines(day_num, 'example01.txt')
|
||||||
|
valley = Valley.parse(lines)
|
||||||
|
result = valley.find_way(1)
|
||||||
|
assert result == 18
|
||||||
|
|
||||||
|
|
||||||
|
def test_walk2():
|
||||||
|
lines = input.read_lines(day_num, 'example01.txt')
|
||||||
|
valley = Valley.parse(lines)
|
||||||
|
result = valley.find_way(2)
|
||||||
|
assert result == (18 + 23)
|
||||||
|
|
||||||
|
|
||||||
|
def test_back_and_forth():
|
||||||
|
lines = input.read_lines(day_num, 'example01.txt')
|
||||||
|
valley = Valley.parse(lines)
|
||||||
|
result = valley.find_way(3)
|
||||||
|
assert result == 54
|
||||||
Loading…
Add table
Add a link
Reference in a new issue