Lucky Palindrome

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The palindrome is a string that can be read the same way from left to right and from right to left. For example, strings "level", "5665" are palindromes, however the string "coder" is not a palindrome. We define "Lucky String" if it has an even length and the first half of this string is equal to the second half of this string. Like "papa" is an easy string because the first half "pa" is equal to

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solution.cppC++17

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