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Grokking the Coding Interview Patterns in JavaScript

Solution: Triples with Bitwise AND Equal To Zero

Understand how to count triplets of integers in an array where the bitwise AND of the three elements is zero. This lesson teaches an efficient two-phase approach using hashing to store pairwise bitwise AND frequencies, significantly reducing time complexity from cubic to quadratic. Explore how to implement this in JavaScript and analyze its time and space complexity for optimized coding interview solutions.

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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 0≤0 \leq i,, j,, k ...