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27 lines
721 B
Python
27 lines
721 B
Python
from collections import defaultdict, Counter
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def calculate_fishes(inp, days):
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fishes = Counter(inp)
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for day in range(days):
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fishes_new = defaultdict(int)
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for fish, cnt in fishes.items():
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if fish == 0:
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fishes_new[8] += cnt
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fishes_new[6] += cnt
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else:
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fishes_new[fish - 1] += cnt
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fishes = fishes_new
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return sum(fishes.values())
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def main(infile):
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with open(infile) as f:
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inp = [int(x) for x in f.readline().split(",")]
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res = calculate_fishes(inp, 80)
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print(f"Part 1, {res}")
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res = calculate_fishes(inp, 256)
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print(f"Part 2, {res}")
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if __name__ == "__main__":
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main("input.txt")
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