Solution: Contains Duplicate II
Explore the sliding window approach to solve the Contains Duplicate II problem by maintaining a set to track elements within a range of size k. Understand how to efficiently check for duplicates with linear time and minimal space, and implement the solution to determine if any duplicates exist within k distance in an array.
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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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