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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. 		string s;
  10. 		int c=0;
  11. 		vector<char> v,p;
  12. 		cin >> s;
  13. 		int n = s.length();
  14. 		if(n%2==0)
  15. 		{
  16. 			int r = n/2;
  17. 			for(int i=0;i<(n/2);i++)
  18. 			{
  19. 				v.push_back(s[i]);
  20. 			}
  21. 			for(int i=n/2;i<n;i++)
  22. 			{
  23. 				p.push_back(s[i]);
  24. 			}
  25. 			for(int i=0;i<(n/2);i++)
  26. 			{
  27. 				if(v[i]==p[i])
  28. 				{
  29. 					c++;
  30. 				}
  31. 			}
  32. 			if(c==r)
  33. 			{
  34. 				cout << "YES" << endl;
  35. 			}
  36. 			else
  37. 			cout << "NO" << endl;
  38.  
  39. 		}
  40. 		else
  41. 		{
  42. 			cout << "NO" << endl;
  43. 		}
  44. 	}
  45. 	return 0;
  46. }
Success #stdin #stdout 0.01s 5320KB
comments (?)
stdin
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10
a
aa
aaa
aaaa
abab
abcabc
abacaba
xxyy
xyyx
xyxy
stdout
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NO
YES
NO
YES
YES
YES
NO
NO
NO
YES
https://ideone.com/QPAdVK
language:
C++ (gcc 8.3)
created:
13 hours ago
visibility:
public

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