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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. string LastName[55] , FirstName[55];
  5.  
  6. signed main()
  7. {
  8.     ios_base :: sync_with_stdio(0);
  9.     cin.tie(0);
  10.     cout.tie(0);
  11.     freopen("bff.inp" , "r" , stdin);
  12.     freopen("bff.out" , "w" , stdout);
  13.     int n;
  14.     cin >> n;
  15.     for(int i = 1; i <= n; i++)
  16.     {
  17.         cin >> LastName[i] >> FirstName[i];
  18.     }
  19.     int ans = 0;
  20.     for(int i = 1; i <= n; i++)
  21.     {
  22.         for(int j = 1; j <= n; j++)
  23.         {
  24.             if(i != j)
  25.             {
  26.                 if(FirstName[i] == LastName[j]) ++ans;
  27.             }
  28.         }
  29.     }
  30.     cout << ans;
  31. }
Success #stdin #stdout 0.01s 5288KB
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Standard input is empty
stdout
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Standard output is empty
https://ideone.com/JBDlSV
language:
C++14 (clang 8.0)
created:
3 days ago
visibility:
public

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