Count subarrays with odd zero count

Q: Count subarrays with odd zero count

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Question

Given an integer array nums, return how many contiguous subarrays contain an odd number of zeros. Provide an O(n) solution (e.g., using prefix parity counts of zero occurrences) and state its time and space complexity. Example: nums = [0, 0, 1, 0, 1] -> 4.

Count subarrays with odd zero count

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