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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int t;
  6. 	cin >> t;
  7. 	while(t--){
  8. 		map<int,int> m;
  9. 		int n;
  10. 		cin >> n;
  11. 		for(int i=0;i<n;i++){
  12. 			int num;
  13. 			cin >> num;
  14. 			m[num]++;
  15. 		}
  16. 		int odd_count = 0;
  17. 		for(auto pr : m){
  18. 			if(pr.second % 2 != 0){
  19. 				odd_count++;
  20. 			}
  21. 		}
  22. 		if(odd_count)
  23. 			cout << "yes\n";
  24. 		else
  25. 			cout << "no\n";
  26. 	}
  27. 	return 0;
  28. }
Success #stdin #stdout 0s 5284KB
comments (?)
stdin
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5
2
2 1
2
1 1
3
3 3 3
4
3 3 4 4
4
1 2 2 2
stdout
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yes
no
yes
no
yes
https://ideone.com/nEHqVx
language:
C++14 (gcc 8.3)
created:
5 days ago
visibility:
public

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