Data Structures and Algorithms with Python | Free DSA with Python Course - DSA with Python - Rotting Oranges | BFS Grid Traversal | Leetcode 994 - Part 122 [Hindi]

🚀 Welcome to Part 122 of Code & Debug’s DSA Python Course 2025! In this lecture, we solve Leetcode 994: Rotting Oranges, a popular grid-based problem using Multi-Source BFS. We simulate the rotting process minute-by-minute while spreading the rot to adjacent fresh oranges. 📚 What you’ll learn in this video: ✅ Understanding the grid structure and orange states ✅ What is Multi-Source BFS and why it’s perfect for this problem ✅ BFS traversal with (i, j) → (i±1, j±1) 4-directional movement ✅ Keeping track of fresh orange count and time (minutes) ✅ Handling edge cases and when to return -1 💡 Why is this important? This problem is widely asked in interviews to test BFS traversal in 2D matrices, especially multi-point propagation problems like infection spread, water fill, and shortest distance to resources. 👉 Practice the problem on Leetcode: 🔗 https://leetcode.com/problems/rotting-oranges/ 👉 Refer to the article for better understanding: 📌 https://codeanddebug.in/blog/rotting-oranges-leetcode-994/ 👉 📄 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. #RottingOranges #GridBFS #MultiSourceBFS #Leetcode994 #MatrixTraversal #PythonDSA #DSAPythonCourse #CodeAndDebug #DSA2025 #CodingInterviews #Part122