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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. 	int n ; cin>>n;
  8. 	vector<int>arr(n);
  9. 	for(int i=0;i<n;i++){
  10. 		cin>>arr[i];
  11. 	}
  12. 	int count = 0 ;
  13. 	vector<bool>vis(100,false);
  14. 	for(int i =0;i<n;i++){
  15. 		if(!vis[arr[i]]){
  16. 			count++;
  17. 			vis[arr[i]]=true;
  18.  
  19. 		}
  20.  
  21. 	}
  22. 	cout<<count;
  23.  
  24. 	return 0;
  25. }
Success #stdin #stdout 0.01s 5284KB
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stdin
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7
1 3 3 2 2 1 4
stdout
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4
https://ideone.com/tuHFEv
language:
C++ (gcc 8.3)
created:
10 days ago
visibility:
public

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