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38 lines
1.1 KiB
Plaintext
38 lines
1.1 KiB
Plaintext
from collections import Counter
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def blink(data, steps):
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counter = Counter(data)
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for i in range(steps):
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new_counter = Counter()
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#data = tuple(x for y in (blink_stone(s) for s in data) for x in y)
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for stone, count in counter.items():
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s = str(stone)
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if stone == 0:
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new_counter[1] += count
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elif len(s) % 2 == 0:
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first, second = int(s[:len(s)//2]), int(s[len(s)//2:])
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new_counter[first] += count
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new_counter[second] += count
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else:
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new_counter[2024*stone] += count
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counter = new_counter
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print(len(counter.items()))
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return counter.total()
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if __name__ == "__main__":
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res = blink((125, 17), 25)
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assert res == 55312, f"expected 55312, but was {res}"
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import sys
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if len(sys.argv) > 1:
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infile = sys.argv[1]
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with open(infile) as f:
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data = tuple(map(int, f.read().rstrip().split()))
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part1 = blink(data, 25)
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print("Part 1: ", part1)
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part2 = blink(data, 75)
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print("Part 2: ", part2)
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