39 lines
930 B
Python
39 lines
930 B
Python
with open("input.txt") as f:
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pond = [int(i) for i in f.read().strip().split(",")]
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print("pond", pond)
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def simulate():
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for i, fish in enumerate(pond[:]):
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# print("i, fish", i, fish)
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newfish = fish - 1
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if newfish < 0:
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newfish = 6
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pond.append(8)
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pond[i] = newfish
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for i in range(0, 80):
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# print("pond", len(pond))
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simulate()
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print("answer", len(pond))
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# each lanternfish creates a new lanternfish once every 7 days.
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# So, you can model each fish as a single number that represents the number of days until it creates a new lanternfish.
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# a new lanternfish would surely need slightly longer before it's capable of producing more lanternfish: two more days for its first cycle.
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# list of the ages of several hundred nearby lanternfish (your puzzle input).
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# Find a way to simulate lanternfish. How many lanternfish would there be after 80 days?
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