2030. Smallest K-Length Subsequence With Occurrences of a Letter

LeetCodeStringStackGreedyMonotonic StackOpen on judge ↗

You are given a string s, an integer k, a letter letter, and an integer repetition. Return the lexicographically smallest subsequence of s of length k that has the letter letter appear at least repetition times. The test cases are generated so that the letter appears in s at least repetition times. A subsequence is a string that can be derived from another string by deleting some or no character

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solution.cppC++17

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