4Sum LeetCode Problem Explained | Optimized JavaScript Solution | Two-Pointer Approach

In this video, I have explained the 4Sum problem (LeetCode 18) in detail with step-by-step logic and a fully optimized JavaScript solution using the two-pointer technique.

✨ What’s covered in this video:

Problem Explanation
Approach and Intuition
Optimized Two-Pointer Solution
Handling Duplicates
Complete JavaScript Code

This is one of the most important problems for FAANG-level coding interviews and will help you strengthen your two-pointer and sorting concepts.

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🔹 LeetCode Problem: 4Sum - LeetCode
🔹 Language Used: JavaScript
🔹 Difficulty Level: Medium to Hard

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