Grokking Advanced Coding Patterns for Interviews
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XOR Queries of a Subarray (medium)
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Problem Statement

You are given an array arr containing integers greater than 0. Additionally, you are given the array of queries where queries[i] = [left<sub>i</sub>, right<sub>i</sub>].

For each query, compute the XOR of the elements in arr from index left<sub>i</sub> to right<sub>i</sub> (inclusive)

Return an array answer where answer[i] represents the result of the i<sup>th</sup> query.

Examples

Example 1:

  • Input: arr = [2, 4, 7, 3], queries = [[0, 1], [1, 3], [0, 2]]
  • Expected Output: [6, 0, 1]
  • Explanation:

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