4Sum Problem | Quadruplet Sum Explained with Code 🔥 | Code with Rahul Kumawat

🔥 **4Sum (Quadruplet Sum) Problem | Complete Explanation + Code** In this video, we solve the **4Sum (Quadruplet Sum)** problem step by step. You will learn how to find all unique quadruplets *(a, b, c, d)* such that: 👉 **a + b + c + d = target** --- ### 🚀 What you will learn: * Brute Force vs Optimized Approach * Sorting + Two Pointer Technique * How to avoid duplicate quadruplets * Clean and efficient coding implementation * Time & Space Complexity analysis --- ### 💡 Why this problem is important? This is one of the most important problems for **coding interviews** and is frequently asked in product-based companies. It helps you master: * Two Pointer Technique * Array manipulation * Problem-solving patterns --- ### 🧠 Prerequisites: * Basic Arrays knowledge * Sorting concepts * 2Sum & 3Sum problems (recommended) --- ### 👨‍💻 Code with Rahul Kumawat ### 📌 Tags: #4Sum #QuadrupletSum #DSA #LeetCode #CodingInterview #Java #ArrayProblems #RahulKumawat #CodeWithRahul --- 🔥 **Keep Learning, Keep Coding!**