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. In this guide, we solve Leetcode #18 in Python and focus on the core idea that makes the solution efficient. You will see the intuition, the step-by-step method, and a clean Python implementation you can use in interviews. 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: https://neetcode.io/ - A better way to prepare for
Net Worth Profile Overview
4sum Leetcode Python Coding Interview Net Worth 2026: Salary, Income & Wealth Net Worth & Biography
Estimated Worth: $21M - $56M
Salary & Income Sources
Career Highlights & Achievements
Assets, Properties & Investments
This section covers known assets, real estate holdings, luxury vehicles, and investment portfolios. Data is compiled from public records, financial disclosures, and verified media reports.
Last Updated: April 7, 2026
Net Worth Outlook & Future Earnings
Disclaimer: Disclaimer: Net Worth estimates are based on publicly available data, media reports, and financial analysis. Actual numbers may vary.