Solution: Count Triplets That Can Form Two Arrays of Equal XOR
Explore how to efficiently count triplets in an integer array where two subarrays have equal XOR values. Understand prefix XOR optimization and hash maps to improve time complexity from cubic to linear. This lesson teaches practical bitwise strategies to solve XOR-related coding interview problems efficiently.
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:
...