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Solution: Intersection of Two Arrays II

Explore how to use hash maps to efficiently find the intersection of two integer arrays where elements appear as many times as they do in both arrays. Learn to build frequency maps and iterate arrays for optimal time and space complexity.

Statement

Given two integer arrays nums1 and nums2, return an array representing their intersection. Each element in the result should appear exactly as many times as it appears in both arrays. The result may be returned in any order.

Constraints:

  • 11 \leq nums1.length, nums2.length 1000\leq 1000 ...