Harshdeep And Navdeep

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Harshdeep and Navdeep are best friends . Navdeep is good at String manipulation concept. Harshdeep challenged Navdeep to solve one problem related to strings . Harshdeep gives a string s of length n. Each character is either one of the first k lowercase latin letters or a question mark. Navdeep’s task is to replace every question mark with one of the first k lowercase latin letters in such a way

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solution.cppC++17

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