Скачать или смотреть LeetCode 18 | 4Sum | Python Solution Explained | Two-Pointer + Hashing | AlgoYogi

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In this video, we solve *LeetCode problem 18: 4Sum* step-by-step using Python. This problem extends the classic 2Sum and 3Sum challenges and teaches you how to combine *nested loops with the two-pointer technique* to find *unique quadruplets* that sum to a target.

👉 *LeetCode Problem Link:* [4Sum - LeetCode 18](https://leetcode.com/problems/4sum/)

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🚀 Timestamps
0:00 Introduction
0:20 Problem Explanation and Constraints
3:00 Two-Pointer + Nested Loop Strategy
9:00 Python Implementation
19:00 Time and Space Complexity

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💡 Why Watch?
Learn how to extend the *two-pointer method* to handle 4Sum efficiently
Understand how to *skip duplicates* to get unique quadruplets
Build clean, readable code that scales from 2Sum to kSum problems

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📢 Next Steps
Try solving this on LeetCode after watching
Explore related problems like:
*3Sum*
*Two Sum*
*K Sum*
Comment below what multi-pointer problem you’d like next!

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#LeetCode #PythonSolutions #4Sum #TwoPointers #AlgoYogi #CodingInterview