Josif_tepe

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Aug 29th, 2025
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C++ 0.29 KB | None | 0 0
  1. #include <iostream>
  2. #include <set>
  3.  
  4. using namespace std;
  5.  
  6. int main() {
  7.    
  8.     int n;
  9.     cin >> n;
  10.    
  11.     set<int> s;
  12.     for(int i = 0; i < n; i++) {
  13.         int x;
  14.         cin >> x;
  15.        
  16.         s.insert(x);
  17.     }
  18.    
  19.     cout << s.size() << endl;
  20.  
  21.     return 0;
  22. }
  23.  
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