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  1. #include <iostream>
  2. using namespace std;
  3. int M=10000007;
  4. long long factorial(int n) {
  5.     long long  f = 1;
  6.     for (int i = 2; i <= n; i++)
  7.         f = (f * i)%M;
  8.     return f;
  9. }
  10.  
  11. int main() {
  12. 	long long t,n,r;
  13. 	cin>>t;
  14. 	while(t--)
  15. 	{
  16. 		cin>>n>>r;
  17. 		cout<<factorial(n) / (factorial(r) * factorial(n - r))<<"\n";
  18. 	}
  19. 	return 0;
  20. }
Success #stdin #stdout 0.01s 5492KB
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https://ideone.com/PInxhU
language:
C++ (gcc 8.3)
created:
2 years ago
visibility:
public

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