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  1. #include <iostream>
  2. #include <bits/stdc++.h>
  3.  
  4. using namespace std;
  5.  
  6. int main() {
  7. 	// your code goes here
  8. 	int n ; cin>>n;
  9. 	int count=0;
  10. 	vector<int>arr(n);
  11. 	for(int i =0;i<n;i++){
  12. 		cin>>arr[i];
  13. 	}
  14. 	vector<bool>vis(n,false);
  15. 	for(int i =0;i<n;i++){
  16. 		if(!vis[i]){
  17. 			count++;
  18. 			for(int j =0;j<n;j++){
  19. 			if (arr[i]==arr[j]){
  20. 				vis[j]=true;
  21. 			}
  22. 		}
  23.  
  24. 		}
  25.  
  26. 	}
  27. 	cout<<"total number of unique elements "<<count<<endl;
  28. 	return 0;
  29. }
Success #stdin #stdout 0.01s 5328KB
comments (?)
stdin
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7

1 2 2 5 6 6 7
stdout
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total number of unique elements 5
https://ideone.com/S4DWQk
language:
C++ (gcc 8.3)
created:
10 days ago
visibility:
public

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