15 lines
226 B
Python
15 lines
226 B
Python
from lib import *
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input = read_input(2020, 25)
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lines = input.splitlines()
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(*nums,) = map(int, lines)
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k = 1
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i = 0
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while k not in nums:
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k = (k * 7) % 20201227
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i += 1
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print(pow(nums[1 - nums.index(k)], i, 20201227))
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