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  1. #include <stdio.h>
  2.  
  3. long long binomial_coefficient(int n, int k) {
  4.     if (k > n - k) {  
  5.         k = n - k;
  6.     }
  7.  
  8.     long long result = 1;
  9.     for (int i = 1; i <= k; i++) {
  10.         result = result * (n - i + 1) / i;  
  11.     }
  12.  
  13.     return result;
  14. }
  15.  
  16. int main() {
  17.     int n, k;
  18.     scanf("%d %d", &n, &k);
  19.     printf("%lld\n", binomial_coefficient(n, k));
  20.     return 0;
  21. }
Success #stdin #stdout 0.01s 5300KB
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4191844505805495
https://ideone.com/B23uc0
language:
C (gcc 8.3)
created:
7 days ago
visibility:
public

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