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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. const int N = 100 ;
  4. int a[N] ;
  5. int main() {
  6.     int n ;
  7.     cin>>n ;
  8.     int frq[101] = {} ;
  9.     for(int i = 0 ; i < n ; i++) /// O(n)
  10.     {
  11.         cin >> a[i];
  12.         frq[a[i]]++ ;
  13.     }
  14.     for(int i = 0 ; i < n ; i++)
  15.     {
  16.         if(frq[a[i]] > 1)
  17.         {
  18.             cout<<a[i]<<' ' ;
  19.             frq[a[i]] = 0 ;
  20.         }
  21.     }
  22.     return 0;
  23. }
Success #stdin #stdout 0.01s 5288KB
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https://ideone.com/BOke62
language:
C++14 (gcc 8.3)
created:
7 days ago
visibility:
public

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