Perfect String

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You have been given a string $S$ and you are asked whether the string is perfect or not. You can divide the string into two equal halves. If the length of the string is odd you can assume that the length of the first half can be one greater than that of the second half. A string is called perfect if both of the halves obtained are the lexicographically smallest among all the permutations that can

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solution.cppC++17

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