Intersection of two Array

Given two arrays, the task is to find their intersection, which consists of common elements without duplicates. Several approaches are discussed: a naive approach with triple nested loops, a better approach using nested loops with a hash set, and an optimized approach using two hash sets or one hash set. The expected time complexity for the optimized methods is O(n+m), and the space complexity is O(n). The result contains common elements in any order.

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