Monday, February 13, 2017

Uri 2374 - Pneu

/*                                                    Codeman
                                                 Arif Khan Nihar
                                                 Uri 2374 - Pneu

  */
#include<bits/stdc++.h>






using namespace std;
int main()
{
      int n ,m ;
      cin >> n >> m;
      cout << ((n != m)? n-m:0) << endl;
    return 0;
}

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