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Solution: Count Subarrays With Fixed Bounds

Explore a step-by-step solution to count subarrays with fixed minimum and maximum bounds using the two pointers technique. Understand how to track key indices and invalid elements to determine all valid subarrays in linear time.

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Statement

Given an integer array, nums, and two integers minK and maxK, return the number of fixed-bound subarrays.

A subarray in nums is called a fixed-bound subarray if it satisfies the following conditions:

  1. The smallest value in the subarray equals minK.

  2. The largest value in the subarray equals maxK.

Note: A subarray is a contiguous sequence of elements within an array.

Constraints:

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