49 lines
1.4 KiB
Python
49 lines
1.4 KiB
Python
from math import prod
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import re
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def part1(file: str):
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acc = []
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with open(file) as f:
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for idx, line in enumerate(f, start=1):
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game = {"red": 12, "green": 13, "blue": 14} # limits
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try:
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for match in re.finditer(
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"|".join([rf"(?P<{k}>\d+(?= {k}))" for k in game.keys()]), line
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):
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for k in game.keys():
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if match.group(k):
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if int(match.group(k)) > game[k]:
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raise Exception
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except Exception:
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pass
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else:
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acc.append(idx)
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return sum(acc)
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def part2(file: str):
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acc = []
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with open(file) as f:
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for line in f:
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game = {"red": 0, "green": 0, "blue": 0}
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for match in re.finditer(
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"|".join([rf"(?P<{k}>\d+(?= {k}))" for k in game.keys()]), line
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):
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for k in game.keys():
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if match.group(k):
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value = int(match.group(k))
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if value > game[k]:
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game[k] = value
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acc.append(prod(game.values()))
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return sum(acc)
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if __name__ == "__main__":
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assert part1("example.txt") == 8
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print(part1("input.txt"))
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assert part2("example.txt") == 2286
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print(part2("input.txt"))
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