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Yet Another Palindrome Making Problem CodeChef Solution

We Are Discuss About CODECHEF SOLUTION

Yet Another Palindrome Making Problem CodeChef Solution

Yet Another Palindrome Making Problem CodeChef Solution

Chef has a string AA (containing lowercase Latin letters only) of length NN where NN is even. He can perform the following operation any number of times:

  • Swap¬†AiAi¬†and¬†Ai+2Ai+2¬†for any¬†1‚ȧi‚ȧ(N‚ąí2)1‚ȧi‚ȧ(N‚ąí2)

Determine if Chef can convert string AA to a palindromic string.

Note: A string is called a palindrome if it reads the same backwards and forwards. For example, noonnoon and levellevel are palindromic strings but ebbebb is not.

Input Format

  • The first line contains a single integer¬†TT¬†‚ÄĒ the number of test cases. Then the test cases follow.
  • The first line of each test case contains an integer¬†NN¬†‚ÄĒ the length of the string¬†AA.
  • The second line of each test case contains a string¬†AA¬†of length¬†NN¬†containing lowercase Latin letters only.

Output Format

For each test case, output YES if Chef can convert the string AA to a palindromic string. Otherwise, output NO.

You may print each character of YES and NO in either uppercase or lowercase (for example, yes, yEs, Yes will be considered identical).

Yet Another Palindrome Making Problem CodeChef Solution

Constraints

  • 1‚ȧT‚ȧ2001‚ȧT‚ȧ200
  • 1‚ȧN‚ȧ10001‚ȧN‚ȧ1000
  • SS¬†contains lowercase Latin letters only.
  • NN¬†is even

Sample Input 1 

3
6
aabbaa
4
abcd
6
zzxyyx

Sample Output 1 

YES
NO
YES

Explanation

Yet Another Palindrome Making Problem CodeChef Solution

Test case 11: The given string is already a palindrome.

Test case 22: It can be proven that is it not possible to convert AA to a palindromic string.

Test case 33: We can perform the following operations:

  • Swap¬†A1A1¬†and¬†A3A3. (Now¬†AA¬†becomes¬†xzzyyx)
  • Swap¬†A2A2¬†and¬†A4A4. (Now¬†AA¬†becomes¬†xyzzyx)

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