fork download
copy 
  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main()
  5. {
  6.    int n, pairs = 0;
  7.     cin >> n;
  8.     int sock[n];
  9.     for(int i = 0; i < n; i++)
  10.        cin >> sock[i];
  11.  
  12.     for(int i = 0; i < n-1; ++i)
  13.     { //selection sort
  14.         for(int j = i+1; j < n; ++j)
  15.         {
  16.             if(sock[i] > sock[j])
  17.             {
  18.                 int tmp = sock[j];
  19.                 sock[j] = sock[i];
  20.                 sock[i] = tmp;
  21.             }
  22.         }
  23.     }
  24.     //23466
  25.     for(int i = 0; i < n-1; ++i) //number of pairs
  26.     {  cout<< "sock["<<i<<"] ="<< sock[i]<<"  ,sock["<<i<<"+1] ="<<sock[i+1]<<endl;
  27.         if(sock[i] == sock[i+1]) 
  28.         {
  29.             pairs++;
  30.         }
  31.         i++;
  32.     }
  33.     cout << pairs << endl;
  34.     return 0;
  35. }
Success #stdin #stdout 0s 15240KB
comments (?)
stdin
copy 
5
43626
stdout
copy 
sock[0] =0  ,sock[0+1] =0
sock[2] =0  ,sock[2+1] =43626
1
https://ideone.com/eQLIMi
language:
C++ (gcc 8.3)
created:
6 years 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!