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Solution: Longest Substring with At Most K Distinct Characters

C# solution for the Longest Substring with At Most K Distinct Characters problem using the Sliding Window pattern.

Statement

Given a string s and an integer k, return the maximum length of a contiguous substring of s that contains at most k distinct characters.

Constraints:

  • 11 \leq s.length 5104\leq 5 \cdot 10^4 ...