Showing posts from October, 2022

Diwali Data Structure Famous Problem

Number of Islands   Given an   m x n   2D binary grid   grid   which represents a map of   '1' s (land) and   '0' s (water), return   the number of islands . An  island  is surrounded by water and is formed by connecting adjacent lands horizontally or vertically. You may assume all four edges of the grid are all surrounded by water.   Example 1: Input: grid = [ ["1","1","1","1","0"], ["1","1","0","1","0"], ["1","1","0","0","0"], ["0","0","0","0","0"] ] Output: 1 Example 2: Input: grid = [ ["1","1","0","0","0"], ["1","1","0","0","0"], ["0","0","1","0","0"], ["0","0","0","1&q