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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	set<int>st;
  6. 	int n;
  7. 	cin>>n;
  8. 	while(n--)
  9. 	{
  10. 	int x;
  11. 	cin>>x;
  12. 	st.insert(x);
  13. 	}
  14. 	cout<<st.size()<<endl;
  15. 	return 0;
  16. }
Success #stdin #stdout 0s 4368KB
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https://ideone.com/28Hs5s
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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