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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int fac(int num,int k)
  5. {
  6. 	if(num  == k)
  7. 	{
  8. 		return 1;
  9. 	}
  10. 	return num * fac(num -1,k);
  11. }
  12. int main() {
  13. 	int n,k;
  14. 	cin>> n >> k;
  15. 	if(n - k == 0 )
  16. 	{
  17. 		cout<< 1;
  18. 		return 0;
  19. 	}
  20. 	if(n-k >= k)
  21. 		cout<<fac(n,n-k)/fac(k,1);
  22. 	else
  23. 		cout<<fac(n,k)/fac(n-k,1);
  24. 	return 0;
  25. }
Runtime error #stdin #stdout 3.38s 4528KB
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stdin
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10 0
stdout
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Standard output is empty
https://ideone.com/k5LNfE
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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