DSA in Python – Bottom View of Binary Tree | BFS + Line Mapping | GFG – Part 115 [Hindi]

🚀 Welcome to Part 115 of Code & Debug’s DSA in Python Course!

In this lecture, we solve the Bottom View of Binary Tree problem from GeeksforGeeks. Using BFS traversal and tracking each node’s horizontal distance, we ensure the last node at each vertical line is visible from the bottom.

📚 What you’ll learn in this video:
✅ What is the bottom view and how it’s different from the top view
✅ BFS traversal using a queue and a line-indexed dictionary
✅ Replacing previous values to always keep the deepest (last) node
✅ Python implementation with deque and dry run explanation
✅ Time and space complexity analysis

👉 Practice the problem on GeeksforGeeks:
🔗 https://geeksforgeeks.org/problems/bottom-view-of-binary-tree/1

👉 Refer to the article for better understanding:
🔗 https://codeanddebug.in/blog/bottom-view-of-binary-tree/

👉 📄 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

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