Encrypted palindrome

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Shubham loves palindromes. And he loves them so much so that he is willing to transform the strings he has to turn them to palindromes. Formally, given a string s, he takes subset of the characters of s and arranges them to form a palindrome. He wants to do it in such a way that length of palindrome is as big as it can get. To save the strings from transformations, the government has decided to

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solution.cppC++17

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