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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	long long int a;
  6. 	cin>>a;
  7. 	set<int>s;
  8. 	for(int i=1; i<=a; i++){
  9. 		long long int x;
  10. 		cin>>x;
  11. 		s.insert(x);
  12. 	}
  13. 	cout<<s.size();
  14. 	return 0;
  15. }
Success #stdin #stdout 0.01s 5316KB
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stdin
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5
2 3 2 2 3
stdout
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2
https://ideone.com/8xBxUJ
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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