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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-1;i++)
  15. 	{
  16. 		m[s[i]]++;
  17. 	}
  18. 	for(int i=1;i<n;i++)
  19. 	{
  20. 		if(m[s[i]]>1)
  21. 		{
  22. 			c=1;
  23. 			break;
  24. 		}
  25. 	}
  26. 	if(c>0)
  27. 	{
  28. 		cout << "YES" << endl;
  29. 	}
  30. 	else
  31. 	{
  32. 		cout << "NO" << endl;
  33. 	}
  34. 	}
  35. 	return 0;
  36. }
Success #stdin #stdout 0.01s 5324KB
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
NO
YES
NO
YES
YES
YES
NO
YES
YES
YES
NO
https://ideone.com/okVSNu
language:
C++ (gcc 8.3)
created:
7 days ago
visibility:
public

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