Created
December 12, 2023 13:17
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Light binomial coefficient
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| def comb(a: int, b: int) -> int: | |
| """ | |
| Implements the binomial coefficient: | |
| ( a ) a ! | |
| ( ) = ------------- | |
| ( b ) b! * (a-b)! | |
| """ | |
| prod = 1 | |
| for i in range(min(b, a-b)): | |
| prod *= a-i | |
| prod /= i+1 | |
| return prod |
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From https://stackoverflow.com/a/58442370