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Shortest run-length encoding after deleting k characters

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DatabricksCodingLast asked Feb 2026

Run-length encoding writes each run of a repeated character as the character followed by the run length when the run is longer than one, so "aaabcc" becomes "a3bc2". Given a string and an integer k, delete at most k characters so that the encoded string is as short as possible, and return that length.

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