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Solution: Binary Subarrays With Sum

Explore the sliding window pattern to solve binary subarray sum problems efficiently. Learn to identify and count contiguous subarrays with sums matching a target goal, managing zeros within the window to optimize the solution. This lesson helps you implement an O(n) time and O(1) space algorithm to count valid subarrays by expanding and contracting the window while tracking sums and leading zeros.

Statement

You are given a binary array, nums, and an integer, goal. Your task is to return the number of non-empty subarraysThis refers to a subarray, which is a contiguous part of the array. with a sum that meets the goal.

Constraints:

  • 11 \leq nums.length 3×104\leq 3 \times 10^4

  • nums[i] is either 00 ...