369 - Combinations/369.cpp

   1 #include <iostream>
   2
   3 using namespace std;
   4
   5 unsigned long long dp[101][101];
   6
   7
   8 int main(){
   9   for (int i=0; i<=100; ++i){
  10     dp[i][0] = dp[i][i] = 1;
  11   }
  12   for (int i=1; i<=100; ++i)
  13     for (int j=1; j<=100; ++j)
  14       dp[i][j] = dp[i-1][j-1] + dp[i-1][j];
  15
  16   int n, m;
  17   cin >> n >> m;
  18   while (n + m){
  19     cout << n << " things taken " << m << " at a time is " << dp[n][m] << " exactly.\n";
  20     cin >> n >> m;
  21   }
  22
  23   return 0;
  24 }