DSA Python - Leetcode 142: Linked List Cycle II | Find the Cycle Starting Point - Part 60 [Hindi]

🚀 Welcome to Part 60 of Code & Debug’s DSA Python Course 2025! In this video, we solve Leetcode 142: Linked List Cycle II, where we not only detect a cycle but also find the starting node of the cycle using Floyd’s Cycle Detection Algorithm (Tortoise and Hare method).

📚 What you’ll learn in this video:
✅ Understanding the problem statement and constraints
✅ Floyd’s Cycle Detection Algorithm (Tortoise and Hare Approach) explained
✅ How to find the cycle's starting node after detection
✅ Time complexity: O(n), Space complexity: O(1)
✅ Step-by-step Python implementation with detailed dry run
✅ Handling edge cases like empty lists and single-node loops

💡 Why is this problem important?
This problem builds on cycle detection techniques and helps in solving advanced problems like intersection of linked lists, loop removal, and network pathfinding algorithms. It’s a frequently asked question in FAANG interviews.

👉 Leetcode Problem Link:
🔗 https://leetcode.com/problems/linked-list-cycle-ii/

👉 Refer to the article for better understanding:
📌 https://docs.google.com/document/d/1hZboxi_7x6ZxfyaKQudP3UNRRaQQoq6r9DOdIrbMTiE/edit?usp=drive_link

👉 📄 Access the full YouTube DSA Playlist Sheet (All Questions in Order):
🔗 https://docs.google.com/spreadsheets/d/1AWE15Fy3wD2iqu2vjK_R7cCiuvSsjYQclcdZmHpF66o/edit?usp=sharing

👉 Enroll in this FREE DSA Python course here:
🔗 https://www.codeanddebug.in/course/master-dsa-with-leetcode

👉 Enroll for Self-Paced Advanced DSA course here:
🔗 https://www.codeanddebug.in/course/zero-to-hero-python-dsa

👉 Enroll for the Live Batches:
🔗 https://www.codeanddebug.in/course/python-with-dsa-live-4-months

🙏 Thank you for supporting Code & Debug! Don’t forget to like, share, and subscribe to our channel. Hit the 🔔 bell icon to stay updated with our latest lectures.

#LinkedList #Leetcode142 #LinkedListCycleII #FindCycleStart #FloydCycleDetection #DSAPythonCourse #PythonDSA #CodeAndDebug #DSA2025 #LearnPython #CodingInterviews #Part60

Видео DSA Python - Leetcode 142: Linked List Cycle II | Find the Cycle Starting Point - Part 60 [Hindi] канала Code and Debug