Calculating Combinations

Правка en1, от ammar_hammoud, 2023-08-04 19:23:33

Hello CF community, I'm trying to solve this problem, the problem tells me that I have to calculate

$$$C_n^r = \frac{N!}{M!\cdot (N-M)!}; 5\leq N\leq 100, M\leq N$$$

in the numerator it will always be $$$\prod _{i = N-M+1}^{n} i$$$ and in the denominator will be $$$ \prod _{i=1}^{min(N, N-M)}i$$$ as the rest will cancel out
and this is my code:

but it gives me WA, I'm not really sure why I'm getting this. Any ideas?

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en1 Английский ammar_hammoud 2023-08-04 19:23:33 589 Initial revision (published)