Minesweeper
You are given a 2D grid representing a Minesweeper game. You need to reveal the cells of the grid according to the following rules:
Islands
Count Sub Islands
You are given two 2D grids, grid1 and grid2, both representing islands, where grid1 represents the original island and grid2 represents a sub-island formed by cutting out a rectangle from…
Find All Groups of Farmland
You are given a 2D grid representing a piece of farmland, where the value 1 represents cultivated land and 0 represents uncultivated land. A group of farmland is a connected…
Walls and Gates
You are given a 2D grid representing a house, with rooms labeled as 'INF' for empty rooms, -1 for walls, and 0 for gates. You need to fill each empty…
Surrounded Regions
Given a 2D board containing 'X' (representing walls) and 'O' (representing open spaces), capture all regions surrounded by 'X'. A region is considered surrounded if all its adjacent cells (top,…
Number of Islands
Given a 2D grid of '1's (land) and '0's (water), count the number of islands. An island is surrounded by water and is formed by connecting adjacent lands horizontally or…
Flood Fill
Given an image represented by a 2D matrix of integers, an initial pixel, and a new color, implement the flood fill algorithm to change all connected pixels with the initial…