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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int N;
  6. 	set<int> st;
  7. 	cin>>N;
  8. 	int K;
  9. 	while(N--){
  10. 		cin>>K;
  11. 		st.insert(K);
  12. 	}
  13. 	cout << st.size() << '\n';
  14. }
Success #stdin #stdout 0.01s 5320KB
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stdin
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5
2 3 2 2 3
stdout
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2
https://ideone.com/wVUE5m
language:
C++14 (gcc 8.3)
created:
11 hours ago
visibility:
public

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