Leetcode 18 🔥 4Sum | Two-Pointers + Sorting | SDE interview Sheet | Optimal Solution + Dry Run

In this video, we solve LeetCode 18 – 4Sum. Code: https://github.com/studyPlacement/CodeHub/blob/main/Solution18 Leetcode Contests: https://youtube.com/playlist?list=PLsLlEdtakGoxoGbAwVRSlRjuB1yv1ycnc&feature=shared Neetcode 150 Playlist: https://youtube.com/playlist?list=PLsLlEdtakGozrvhxZsPfvXavXYzX2GUig&feature=shared SDE Sheet for Interview: https://youtube.com/playlist?list=PLsLlEdtakGozEsXcEpJPihiod1MwHf3M1&feature=shared DP Playlist: https://youtube.com/playlist?list=PLsLlEdtakGoyNROP7uWS9OLLHs9_JluVM&feature=shared Sliding window Playlist: https://youtube.com/playlist?list=PLsLlEdtakGozlKx_L-5PQJO-ua_maQb6R&feature=shared Binary Search Playlist: https://youtube.com/playlist?list=PLsLlEdtakGozNxx5rfRgEW-1DYseLnDbV&feature=shared We cover: - Problem breakdown and constraints - Sorting + double two-pointer approach - Avoiding duplicates and edge cases - Detailed dry run with an example - Clean Java implementation - Time and space complexity analysis Problem Link: https://leetcode.com/problems/4sum/ Found this helpful? Please like, comment on your approach, and subscribe for more DSA walkthroughs! #LeetCode18 #4Sum #TwoPointers #JavaDSA #CodingInterview #ArrayProblems Timestamps: 00:00 Introduction 00:18 Problem Statement 01:15 Brute force Approach 04:10 Brute force Implementation 08:13 Optimized Approach 13:00 Optimized Implementation 16:20 Space Optimization