DSA in Python Course – Alien Dictionary | Topological Sort in Graph | GFG | Part 141 [Hindi]

👽 Welcome to Part 141 of Code & Debug’s DSA in Python Course!
In this session, we solve the popular Alien Dictionary problem from GFG using Topological Sorting in Directed Graphs.

This is a classic application of Kahn’s Algorithm / DFS-based Topo Sort, where we infer the character order of an alien language based on a sorted dictionary.

🔍 In this video, you will learn:
✅ How to model problems as Directed Acyclic Graphs (DAG)
✅ Building adjacency list based on character precedence
✅ Performing Topological Sort (Kahn’s Algorithm / DFS approach)
✅ Dry run, edge cases & input modeling
✅ Complete time and space complexity analysis

📄 GFG Problem Link:
https://www.geeksforgeeks.org/problems/alien-dictionary/1

👉 📄 Access the full YouTube DSA Playlist Sheet (All Questions in Order):
🔗 https://docs.google.com/spreadsheets/d/1AWE15Fy3wD2iqu2vjK_R7cCiuvSsjYQclcdZmHpF66o/edit?usp=sharing

👉 Enroll in the free DSA Python course here:
https://codeanddebug.in/course/master-dsa-with-leetcode

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https://codeanddebug.in/course/zero-to-hero-python-dsa

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