Data Structures and Algorithms with Python | Free DSA with Python Course - DSA Python - Eventual Safe States | BFS | Reverse Graph + Topo Sort | LC 802 - Part 139 [Hindi]

Welcome to Part 139 of Code & Debug’s DSA Python Course 2025! In this video, we solve Leetcode 802 - Find Eventual Safe States using a BFS + Topological Sort (Kahn’s Algorithm) approach. Rather than the typical DFS, we flip the graph and apply Kahn’s algorithm to find terminal safe nodes – the ones that do not lead to any cycle. 🔍 In this video, you’ll learn: ✅ How to reverse a directed graph ✅ Using indegree calculation to find safe nodes ✅ Applying BFS with queue for topological processing ✅ Why we sort the final answer ✅ Full dry run & conceptual clarity ✅ Time & Space Complexity breakdown This method is clean, fast, and a great way to understand how topological sorting helps in cycle detection and terminal node identification. 🔗 Leetcode 802 - Find Eventual Safe States: https://leetcode.com/problems/find-eventual-safe-states/description/ 👉 Refer to the article for better understanding: 🔗 https://codeanddebug.in/blog/find-eventual-safe-states-bfs/ 📄 Full DSA YouTube Playlist (All questions in order): 🔗 https://docs.google.com/spreadsheets/d/1AWE15Fy3wD2iqu2vjK_R7cCiuvSsjYQclcdZmHpF66o/edit?usp=sharing 🚀 Free Master DSA with Python Course: 🔗 https://codeanddebug.in/course/master-dsa-with-leetcode 💡 Self-Paced Advanced DSA Course (Zero to Hero): 🔗 https://codeanddebug.in/course/zero-to-hero-python-dsa 🎯 Don't forget to like, comment, and subscribe for more high-quality content from Code & Debug. Hit the 🔔 bell icon for instant notifications! 🎯 Perfect for: Beginners & intermediate students aiming for placements, internships, and tech interviews! 💬 If you enjoyed this video, don’t forget to Like | Share | Comment and hit the 🔔 bell icon for more updates. #EventualSafeStates #Leetcode802 #KahnsAlgorithm #TopologicalSort #GraphBFS #PythonDSA #CodeAndDebug #Part139 #DSACourse2025 #TerminalNodes #SafeNodes #CycleDetection #ReverseGraph #BFSInGraphs