LeetCode 130: Surrounded Regions | C# Solution | DFS/BFS Approach скачать в хорошем качестве

LeetCode 130: Surrounded Regions | C# Solution | DFS/BFS Approach

📝 In this video, I solve the #leetcode problem 130: Surrounded Regions using #dfs and #bfs approaches in C#. This graph-based problem asks us to capture all regions of ‘O’ characters that are completely surrounded by ‘X’ characters in a board. 💡 Problem Overview:Given an m x n matrix board containing ‘X’ and ‘O’, we need to capture all regions surrounded by ‘X’. A region is captured by flipping all ‘O’s into ‘X’s in that surrounded region. ⏱️ Time Complexity: O(mn) where m is the number of rows and n is the number of columns 🧠 Space Complexity: O(mn) in worst case due to recursion stack or queue Timestamps: 00:00 - Understanding problem statement 00:53 - DFS + Graph traversal 02:07 - Big O Notation explained 02:33 - C# solution walk-through 03:45 - Solution analysis - runtime + memory Key Concepts Covered: • Graph representation of 2D matrices • Depth-First Search (DFS) implementation • Breadth-First Search (BFS) implementation • Boundary traversal techniques • In-place matrix modifications What You’ll Learn: • How to identify unsurrounded regions starting from boundaries • Efficient graph traversal in matrix problems • Marking techniques to avoid using extra space • Converting between different traversal approaches Related LeetCode Problems: 1. LeetCode 200: Number of Islands 2. LeetCode 417: Pacific Atlantic Water Flow 3. LeetCode 695: Max Area of Island 4. LeetCode 1254: Number of Closed Islands Perfect For: • Software engineering interview preparation • Intermediate algorithm learners • Graph algorithm enthusiasts • C# developers practicing #codinginterviews Prerequisites: • Basic understanding of graphs • Knowledge of DFS/BFS algorithms • Familiarity with 2D arrays in C# Links: • Problem: https://leetcode.com/problems/surroun... • Solution Code: https://shortenertool-qojxs-fa.azurew... • Support Me: https://buymeacoffee.com/hgindra #graphalgorithms #leetcode130 #csharp #codinginterview #dfs #bfs #algorithms #datastructures #programming #interviewprep If you found this solution helpful, please subscribe to the channel and share your questions or alternative approaches in the comments below!