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

🚀 Welcome to Part 60 of Code & Debug’s DSA in Python Course!

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.

👉 Link to solve this question:
https://leetcode.com/problems/linked-list-cycle-ii/description/

👉 Refer the article below for better understanding:

Linked List Cycle II | Leetcode 142 | Complete Guide with 2 Different Solutions

👉 📄 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

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