3 Sum | Brute, Better & Optimized Approach with Codes | Leetcode 15

Video Description

This is Lecture 38 of DSA Placement Series. Hashing Problems - Part 2. Want to study for Tech Placements/Internships from us : Our Latest Placement Batches : https://linktr.ee/apnacollege.in Company wise DSA Sheet Link : https://docs.google.com/spreadsheets/d/1mvlc8EYc3OVVU3X7NKoC0iZJr_45BL_pVxiJec0r94c/edit?usp=sharing New DSA Sheet : coming soon! Share your progress on Twitter : https://x.com/ShradhaKhapra_ DSA Series full playlist : https://www.youtube.com/playlist?list=PLfqMhTWNBTe137I_EPQd34TsgV6IO55pt Timestamps 00:00 Introduction 00:21 3Sum Qs 02:46 IMPORTANT 03:11 BruteForce Solution 7:55 Code 14:05 Time & Space Complexity 16:02 Better Solution : Hashing 21:02 Code 24:14 Dry Run 27:13 Time & Space Complexity 28:36 Optimal Solution : 2 Pointer Approach 41:25 Code 43:45 Time & Space Complexity Shradha Ma'am community Instagram : https://www.instagram.com/shradhakhapra LinkedIn : https://www.linkedin.com/in/shradha-khapra/