3527. Find the Most Common Response

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You are given a 2D string array responses where each responses[i] is an array of strings representing survey responses from the ith day. Return the most common response across all days after removing duplicate responses within each responses[i]. If there is a tie, return the lexicographically smallest response. Example 1: Input: responses = [["good","ok","good","ok"],["ok","bad","good","ok","

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solution.cppC++17

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