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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. int testy, n, k;
  6.  
  7. int main()
  8. {
  9.  cin>>testy;
  10.         for (int i=0; i<testy; i++)
  11.         {
  12.         cin>>n>>k;
  13.         int x=1;
  14.         for (int j=n; j>(n-k); j--) x*=j;
  15.  
  16.         for (int j=1; j<=k; j++) x/=j;
  17.         cout<<x<<endl;
  18.         }
  19. }
Success #stdin #stdout 0s 16064KB
comments (?)
stdin
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8
0 0
7 3
1000 2
1000 998
1000 1
1000 999
1000 3
1000 997
stdout
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1
35
499500
0
1000
0
166167000
0
https://ideone.com/9DN2Ui
language:
C++ (gcc 8.3)
created:
7 years ago
visibility:
public

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