fork download
copy 
  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. void Halmantechy()
  4. {
  5.     cin.tie(0);
  6.     cin.sync_with_stdio(0);
  7.     cout.tie(0);
  8.     cout.sync_with_stdio(0);
  9. }
  10. int main()
  11. {
  12.     Halmantechy();
  13.     int n,target; cin >> n;
  14.     int arr[n];
  15.     int counter = 0;
  16.     for (int i=0; i<n;i++)
  17.     {
  18.         cin >> arr[i];
  19.     }
  20.     sort(arr,arr+n);
  21.     target = arr[0] + arr[n-1];
  22.     for (int i =0;i < n-1;i++)
  23.     {
  24.         for(int j=i+1;j<n;j++)
  25.         {
  26.             if (arr[i]+arr[j] == target && i < j)
  27.             {
  28.                 counter++;
  29.             }
  30.         }
  31.     }
  32.     cout << counter;
  33.  
  34.     return 0;
  35. }
  36.  
Success #stdin #stdout 0.53s 5292KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
2
https://ideone.com/hPvFyV
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!