Palindrome Love
It's Valentine's Month, and so Chef wants to gift a string to Chefina. He knows that Chefina likes [palindromic](https://en.wikipedia.org/wiki/Palindrome) strings. Chef has a string $S$ consisting of digits from $0$ to $9$. He wants to convert this to a palindrome by performing zero or more operations, where an operation is defined as follows: - Pick any digit and replace **all of its occurrences
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solution.cppC++17
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