Algorithm to find the most repeated word/string in a sentence efficiently.

Please suggest me how to design an algorithm to find the most repeated word/string in a sentence efficiently.

Is the array sorted previously? if not then use std::sort in <algorithm> library(put the strcmp function in). Once we sorted, all the same strings will stand next to each other, find the longest contiguous sub-sequence with all the strings equal to each other. Complexity: O(n log n)

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