Make the XOR of All Segments Equal to Zero: coding question

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Given an array nums and integer k, find the minimum number of element changes so that every contiguous subarray of length k has XOR equal to zero. Key insight: indices partition into k residue classes (by index mod k), and you choose values for each class to make their XOR zero while minimizing edits — typically solved by DP over XOR states using frequency counts (value domain < 2^10).

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Leetcode 1787. Make the XOR of All Segments Equal to Zero
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Make the XOR of All Segments Equal to Zero

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Make the XOR of All Segments Equal to Zero

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