👉 LeetCode 18: 4Sum Problem Explained | Java Solution | Two Pointer + Sorting Approach

🚀 Welcome to MDTech! In this video, we solve **LeetCode 18** – **4Sum** problem step-by-step using Two Pointer + Sorting approach in JavaScript and Java. We’ll break down the logic, handle duplicates efficiently, and implement clean, optimal code in both languages. 🔍 What You’ll Learn Understanding the 4Sum problem statement How to apply sorting and two-pointer logic Handling duplicates efficiently Writing clean, optimal code in JavaScript and Java Time and space complexity breakdown 💻 Code Links: LeetCode Problem: https://leetcode.com/problems/4sum/ 📚 Related Videos 3Sum LeetCode Solution: https://www.youtube.com/watch?v=TSNhlV9ZXt4 LeetCode II – Two Sum - https://www.youtube.com/watch?v=TdBWJV8_zI4 🧠 Timestamps 00:00 Introduction 00:10 Problem statement 01:09 Understanding problem 04:36 Brute force solution explained 10:30 Brute force solution execution in leetcode 15:30 Better solution explained 23:53 Better solution execution in leetcode 28:51 Optimal solution explained 32:15 Optimal solution execution in leetcode 34:45 Wrap up 🎯 This video is perfect for: • Students preparing for FAANG / tech interviews • DSA learners improving problem-solving skills • Developers brushing up on Two Pointer techniques On this channel, you'll find: ✅ Beginner to Advanced DSA Tutorials (Arrays, Linked Lists, Trees, Graphs, Dynamic Programming & more!) ✅ Coding Interview Preparation (Google, Microsoft, Amazon, FAANG & top tech companies) ✅ LeetCode, CodeChef, HackerRank Solutions with in-depth explanations ✅ System Design & Competitive Programming Tips 🎯 Whether you're a beginner starting your DSA journey or a pro sharpening your problem-solving skills, this channel has something for you!🔔 Subscribe now & start your DSA mastery journey today! 📌 Follow us for updates & extra content: 📱Instagram: https://www.instagram.com/maheshrd999/ 🌐 LinkedIn: https://www.linkedin.com/in/mahesh-dharwad-b4839267/ #LeetCode #4Sum #MDTech #CodingInterview #JavaScript #Java #DSA #TwoPointers #LeetCodeSolutions #Programming