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Solution: Contains Duplicate II

Explore how to apply the sliding window method to identify duplicates within a given range in an integer array. Understand maintaining a window of size k to track elements and detect duplicates in linear time, optimizing both time and space complexity.

Statement

You are given an integer array, nums, and an integer k. Determine whether two distinct indices, i and j, are in the array, such that nums[i] == nums[j] and the absolute difference between i and j is at most k. Return TRUE if such indices exist; otherwise, return FALSE.

Constraints:

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