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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. 	{
  9. 		int n,c=0;
  10. 		cin >> n;
  11. 		string s;
  12. 		cin >> s;
  13. 		map<char , int> m;
  14. 		for(int i=0;i<n;i++)
  15. 		{
  16. 			m[s[i]]++;
  17. 		}
  18. 		for(auto ch : m)
  19. 		{
  20. 			if(ch.second>1)
  21. 			{
  22. 				c=1;
  23. 				break;
  24. 			}
  25. 		}
  26. 		if(c>0)
  27. 		{
  28. 			cout << "YES" << endl;
  29. 		}
  30. 		else
  31. 		cout << "NO" << endl;
  32. 	}
  33. 	return 0;
  34. }
Success #stdin #stdout 0.01s 5272KB
comments (?)
stdin
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12
3
aaa
3
aba
3
aab
4
abca
4
abba
4
aabb
5
abaca
5
abcda
5
abcba
6
abcbbf
6
abcdaa
3
abb
stdout
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YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
https://ideone.com/cxuxal
language:
C++ (gcc 8.3)
created:
10 days ago
visibility:
public

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