3816. Lexicographically Smallest String After Deleting Duplicate Characters

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You are given a string s that consists of lowercase English letters. You can perform the following operation any number of times (possibly zero times): - Choose any letter that appears at least twice in the current string s and delete any one occurrence. Return the lexicographically smallest resulting string that can be formed this way. Example 1: Input: s = "aaccb" Output: "aacb" Explana

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solution.cppC++17

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