Web Reference: 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. Two approaches to solving the Two Sum problem on Leetcode. Feel free to drop any questions on the video below, along with any other questions you'd like to see answered :)...more 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.
YouTube Excerpt: Two approaches to solving the Two Sum problem on
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4sum Leetcode Code Whiteboard Net Worth 2026: Salary, Income & Wealth Net Worth & Biography
Estimated Worth: $69M - $92M
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Last Updated: April 8, 2026
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