DSA Python - Shortest Path in Binary Matrix | Leetcode 1091 | BFS Grid Traversal - Part 149 [Hindi]

Welcome to Part 149 of Code & Debug’s DSA Python Course 2025!

In this video, we tackle Leetcode 1091 - Shortest Path in Binary Matrix, a classic BFS-based grid shortest path problem with 8-directional movement.

We use a distance matrix for relaxation and stop as soon as we reach the destination. This is a perfect example to understand how BFS can be extended to weighted-like logic without using Dijkstra or priority queue.

👨‍🏫 What’s covered in this video:
✅ Problem walkthrough and why normal DFS won't work
✅ BFS grid traversal using a queue
✅ 8-directional movement from every cell
✅ Maintaining a distance matrix and relaxing distances
✅ Early exit when destination is reached
✅ Handling blocked starting and ending cells
✅ Python code walkthrough with dry run
✅ Time and Space Complexity Analysis

This problem is a great stepping stone for mastering grid-based BFS and pathfinding in constrained environments.

🔗 Leetcode 1091 - Shortest Path in Binary Matrix:

🔗 Code Reference for Path Reconstruction:

📄 Full Playlist Sheet (All Questions in Order):

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[AdithyaShine-fu]

What are the difference between this course and the paid course. I'm planning to buy it.
1. Is the tutor anirudh sir itself?
2.more long and depth lecs unlike 15min lecs on youtube.?