Created
August 20, 2019 15:52
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Modular Multiplicative Inverse 模逆元
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| def ext_euclid(a, b): | |
| if b == 0: | |
| return 1, 0, a | |
| else: | |
| x, y, q = ext_euclid(b, a % b) | |
| x, y = y, (x - (a // b) * y) | |
| return x, y, q | |
| def inverse(a, n): | |
| x, y, q = ext_euclid(a, n) | |
| return x % n |
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