49 lines
1.3 KiB
Python
49 lines
1.3 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: List[str], noDouble: bool = True) -> List[List[str]]:
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paths = []
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visited.append(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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paths.append(['end'])
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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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sub_paths = getPaths(caveMap, thisCave, visited.copy(), noDouble or foundDouble)
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[paths.append(x) for x in sub_paths if 'end' in x]
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return paths
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class Day(AOCDay):
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test_solutions_p1 = [10, 19, 226, 5076]
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test_solutions_p2 = [36, 103, 3509, 145643]
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def part1(self) -> Any:
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caveMap = getCaveMap(self.getInputAsArraySplit("-"))
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return len(getPaths(caveMap, 'start', []))
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def part2(self) -> Any:
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caveMap = getCaveMap(self.getInputAsArraySplit("-"))
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return len(getPaths(caveMap, 'start', [], False))
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