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#248 · #2461 · Maximum Sum of Distinct Subarrays With Length K(长度为 K 子数组中的最大和)

📌 Problem Statement & Constraints

You are given an integer array nums and an integer k. Find the maximum subarray sum for a subarray of length k where all elements are distinct. Return 0 if no such subarray exists. Constraints: 1 <= k <= nums.length <= 10^5, 1 <= nums[i] <= 10^5.
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