mediumArraysPattern: Sliding Window
Min Length Alternating Subarray Solution
Problem Statement
Given an array of integers `arr` of length `n`, find the minimum length of a subarray that contains exactly `i` (i >= 1) pairs of consecutive elements where the value of the first element in the pair is greater than the second element in the pair, and at most `i` pairs where the value of the first element in the pair is smaller than the second element in the pair.
Constraints
- 1 <= array length <= 10^5
- All elements are distinct integers in the range [-10^9, 10^9].
Time: O(n) Space: O(1)
The optimal approach uses a sliding window technique, maintaining a window of elements that satisfy the alternating condition and updating the minimum length as the window moves, resulting in a linear time complexity. This approach efficiently tracks the pattern without needing to examine all possible subarrays.
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