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Russische Bauernmultiplikation / Ancient Egyptian Multiplication
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| // Algorithmus | |
| // (DE) http://ccd-school.de/coding-dojo/function-katas/russische-bauernmultiplikation/ | |
| // (EN) https://en.wikipedia.org/wiki/Ancient_Egyptian_multiplication | |
| let rec mul a b = | |
| match a with | |
| | 1 -> b | |
| | a when a <= 0 -> 0 | |
| | a when x % 2 = 0 -> mul (a/2) (b*2) | |
| | a -> mul (a/2) (b*2) + b |
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