66 lines
1.5 KiB
Python
66 lines
1.5 KiB
Python
from collections import defaultdict
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from tools.aoc import AOCDay
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from typing import Any, Dict, List
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def getCaveMap(lines: List[List[str]]) -> Dict[str, List[str]]:
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m = defaultdict(list)
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for l, r in lines:
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m[l].append(r)
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m[r].append(l)
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return m
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def getPaths(caveMap: Dict[str, List[str]], start: str, visited: set, noDouble: bool = True) -> int:
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pathCount = 0
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visited.add(start)
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for thisCave in caveMap[start]:
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if thisCave == 'start':
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continue
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if thisCave == 'end':
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pathCount += 1
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continue
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foundDouble = False
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if thisCave.islower() and thisCave in visited:
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if noDouble:
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continue
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foundDouble = True
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pathCount += getPaths(caveMap, thisCave, visited.copy(), noDouble or foundDouble)
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return pathCount
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class Day(AOCDay):
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inputs = [
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[
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(10, "test_input12"),
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(19, "test_input12_2"),
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(226, "test_input12_3"),
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(5076, "input12")
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],
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[
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(36, "test_input12"),
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(103, "test_input12_2"),
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(3509, "test_input12_3"),
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(145643, "input12")
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]
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]
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def part1(self) -> Any:
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caveMap = getCaveMap(self.getInputAsArraySplit("-"))
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return getPaths(caveMap, 'start', set())
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def part2(self) -> Any:
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caveMap = getCaveMap(self.getInputAsArraySplit("-"))
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return getPaths(caveMap, 'start', set(), False)
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if __name__ == '__main__':
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day = Day(12)
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day.run(verbose=True)
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