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  1. #include <iostream>
  2. #include <bits/stdc++.h>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	// your code goes here
  7.     set<int> s;
  8.     int n,x;
  9.     cin>>n;
  10.     while(n--){
  11.        cin>>x;
  12.        s.insert(x);
  13.     }
  14.     cout<<s.size();
  15. 	return 0;
  16. }
Success #stdin #stdout 0s 4320KB
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https://ideone.com/8H3jPu
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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