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![[Java] Leetcode 340. Longest Substring with At Most K Distinct Characters [Sliding Windows #4]](/_next/image?url=https%3A%2F%2Fi.ytimg.com%2Fvi%2FchKR9PwSMf4%2Fhq720.jpg%3Fsqp%3D-oaymwEXCNAFEJQDSFryq4qpAwkIARUAAIhCGAE%3D%26rs%3DAOn4CLBNtxMv_FcgeY0G9FrffIg5bnoerg&w=256&q=75)
