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  1. #include <stdio.h>
  2. int comb(int n, int k){
  3. 	int N=n,K=k;
  4. 	if (k==n){
  5. 		return 1;
  6. 	}
  7. 	else if(K==1){
  8. 		return n;
  9. 	}
  10. 	else{
  11. 		for(int i=1;i<k;i++){
  12. 			N=N*(n-i);
  13. 			K=K*(k-i);
  14. 		}
  15. 		return N/K;
  16. 	}
  17. }
  18. int main(void) {
  19. int n, k;
  20. scanf("%d", &n);
  21. scanf("%d", &k);
  22. printf("%d\n", comb(n, k));
  23. return 0;
  24. }
Success #stdin #stdout 0s 5292KB
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https://ideone.com/rmTVYU
language:
C (gcc 8.3)
created:
3 days ago
visibility:
public

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