3Sum | Leetcode 15 | Two Pointers | C++ | Follow up - 4Sum & K-Sum

00:00 3Sum Problem Description 01:37 Brute Force Approach 03:36 Hashing Approach 09:23 Two Pointers Approach 14:43 3Sum Code Walkthrough 18:06 4Sum Problem Description 18:47 4Sum Code Walkthrough 15. 3Sum Problem Link : https://leetcode.com/problems/3sum/ Solution : https://leetcode.com/problems/3sum/submissions/926121025/ Practice Follow UP : 18. 4Sum Problem Link : https://leetcode.com/problems/4sum/ Solution : https://leetcode.com/problems/4sum/submissions/926121598/