Solution: Triples with Bitwise AND Equal To Zero
Explore how to solve the problem of finding triplets in an array whose bitwise AND equals zero by using a two-phase approach involving precomputing pairwise AND frequencies and leveraging a hash map for efficient counting. This lesson helps you understand algorithm optimization and bitwise manipulation to reduce complexity from O(n³) to O(n²).
We'll cover the following...
We'll cover the following...
Statement
You’re given an array of integers called nums. Your task is to count how many triplets of indexes (i, j, k) satisfy the condition nums[i] & nums[j] & nums[k] == 0, where & is the bitwise AND operator and ijk