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December 28, 2020 03:41
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Advent of Code 2020 Day 25
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| def get_loops(*search, max_iter=10000000): | |
| value = 1 | |
| n = 1 | |
| while search and n <= max_iter: | |
| value = (value * 7) % 20201227 | |
| if value in search: | |
| yield (value, n) | |
| n += 1 | |
| ## Part 1 | |
| pk_1, pk_2 = 1327981, 2822615 | |
| loops = dict(get_loops(pk_1, pk_2)) | |
| print( | |
| pow(pk_1, loops[pk_2], 20201227), | |
| pow(pk_2, loops[pk_1], 20201227)) |
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