Solution: Count Triplets That Can Form Two Arrays of Equal XOR
Explore how to count triplets in an array so that two subarrays have equal XOR. Understand the use of bitwise XOR, prefix XOR arrays, and hash maps for an optimized O(n) solution, improving beyond naive cubic approaches. This lesson helps you grasp efficient problem-solving in bitwise manipulation for coding interviews.
We'll cover the following...
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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