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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main()
  5. {
  6.     int n;
  7.     cin >> n;
  8.  
  9.     vector<int> nums(n);
  10.     vector<int> f(n + 1, 0);
  11.  
  12.     // taking input
  13.     for (int i = 0; i < n; i++)
  14.     {
  15.         cin >> nums[i];
  16.     }
  17.  
  18.     // counting the frequency
  19.     for (int i = 0; i < n; i++)
  20.     {
  21.         f[nums[i]]++;
  22.     }
  23.  
  24.     for (int i = 0; i < n; i++)
  25.     {
  26.         if (f[i] == 1)
  27.             cout << i << endl;
  28.         ;
  29.     }
  30.  
  31.     return 0;
  32. }
  33.  
Success #stdin #stdout 0.01s 5284KB
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Standard input is empty
stdout
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Standard output is empty
https://ideone.com/ZAZK6g
language:
C++ (gcc 8.3)
created:
17 days ago
visibility:
public

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