Data Structures and Algorithms with Python | Free DSA with Python Course - DSA Python 2025 - Number of Islands | DFS & BFS Grid Traversal | Leetcode 200 - Part 131 [Hindi]

🚀 Welcome to Part 131 of Code & Debug’s DSA Python Course 2025! In this video, we solve Leetcode 200: Number of Islands, one of the most classic problems based on grid traversal. You’ll learn how to count the number of disconnected land masses using both DFS and BFS techniques. 📚 What you’ll learn in this video: ✅ Understanding grid-based island problems ✅ DFS-based approach for marking connected land ✅ BFS approach using queue and visited matrix ✅ Handling edge cases and island counting logic ✅ Time and space complexity analysis 💡 Why is this important? Mastering problems like Number of Islands builds your fundamentals for solving similar questions like flood fill, surrounded regions, enclaves, rotten oranges and more. This is a must-know problem for any tech interview. 👉 Practice the problem on Leetcode: 🔗 https://leetcode.com/problems/number-of-islands/ 👉 Refer to the article for better understanding: 🔗 https://codeanddebug.in/blog/number-of-islands-leetcode-200/ 👉 📄 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://codeanddebug.in/course/master-dsa-with-leetcode 👉 Enroll for Self-Paced Advanced 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 🔔 bell icon to stay updated with our latest lectures. #NumberOfIslands #Leetcode200 #GridTraversal #BFSDFS #IslandCounting #PythonDSA #DSAPythonCourse #CodeAndDebug #DSA2025 #CodingInterviews #Part131