Data Structures and Algorithms with Python | Free DSA with Python Course - DSA in Python Course - Leetcode 18: 4Sum Problem - Part 45 [Hindi] | Code & Debug

Welcome to Part 45 of Code & Debug’s DSA Python Course! In this lecture, we will solve Leetcode Problem 18: 4Sum, an extension of the 3Sum problem, requiring efficient two-pointer and sorting techniques to find quadruplets that sum to a target value. 📚 What you’ll learn in this video: ✅ Understanding the problem statement and constraints ✅ Brute force vs. optimized three-pointer approach ✅ How to handle duplicates efficiently ✅ Step-by-step Python implementation ✅ Time and space complexity analysis 💡 This problem is crucial for mastering advanced array manipulation and two-pointer optimization techniques used in competitive programming. 👉 Link to solve this question: https://leetcode.com/problems/4sum/description/ 👉 Refer the article below for better understanding: https://codeanddebug.in/blog/4sum-leetcode-18/ 👉 📄 Access the full YouTube DSA Playlist Sheet (All Questions in Order): 🔗 https://docs.google.com/spreadsheets/d/1AWE15Fy3wD2iqu2vjK_R7cCiuvSsjYQclcdZmHpF66o/edit?usp=sharing 👉 Enroll in the free DSA Python course here: https://codeanddebug.in/course/master-dsa-with-leetcode 👉 Enroll for Self-Paced Advance DSA course here: https://codeanddebug.in/course/zero-to-hero-python-dsa 🙏 Thank you for supporting Code & Debug! Don’t forget to like, share, and subscribe to our channel. Hit the 🔔 to stay updated with our latest lectures. #DSAPythonCourse #Leetcode18 #4Sum #TwoPointerTechnique #PythonDSA #DSA2025 #CodeAndDebug #LearnPython #CodingInterviews