Leetcode 18 4sum Problem Explained HsNr5EPdbtU

Web Reference: In-depth solution and explanation for LeetCode 18. 4Sum in Python, Java, C++ and more. Intuitions, example walk through, and complexity analysis. Better than official and forum solutions. In this video, we solve *LeetCode 18* – *4Sum* problem step-by-step using Two Pointer + Sorting approach in JavaScript and Java. Given an array nums of n integers, return an array of all the unique quadruplets [nums[a], nums[b], nums[c], nums[d]] such that: a, b, c, and d are distinct. You may return the answer in any order. Example 1: Output: [[-2,-1,1,2],[-2,0,0,2],[-1,0,0,1]] Example 2: Output: [[2,2,2,2]] Constraints: any solutions. No comments yet.

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