Surrounded Region - Graph - Leetcode 130 - DFS

In this video, we solve the Surrounded Regions problem from LeetCode using a clean Depth-First Search (DFS) approach in Python!

🔍 Problem Summary:
Given a 2D board containing 'X' and 'O', capture all regions surrounded by 'X'. A region is captured by flipping all 'O's into 'X's in that surrounded region.

🎯 What You'll Learn:

How to approach grid-based DFS problems

Handling boundary conditions effectively

Modifying the grid in-place

Time & space complexity analysis
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