Solution: Count Triplets That Can Form Two Arrays of Equal XOR
Explore how to efficiently count triplets in an array that form two subarrays with equal XOR values using prefix XOR and hash maps. Understand bitwise XOR operations and optimize from a cubic to linear time complexity, enhancing problem-solving skills in bitwise manipulation.
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We'll cover the following...
Statement
Given an array of integers, arr, we need to find three indices, i, j, and k, such that i j k arr.length.
We define two values, a and b, as follows:
a = arr[i] ^ arr[i + 1] ^ ... ^ arr[j - 1]b = arr[j] ^ arr[j + 1] ^ ... ^ arr[k]
Note: ^ denotes the bitwise XOR operation.
Return the count of triplets (i, j, k) for which a is equal to b.
Constraints:
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