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leetcode Max Area of Island Solution (Max Area of Island) (leetcode june 2021 challenge)

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Max Area of Island You are given an  m x n  binary matrix  grid . An island is a group of  1 's (representing land) connected 4-directionally (horizontal or vertical.) You may assume all four edges of the grid are surrounded by water. The area of an island is the number of cells with a value  1  in the island. Return  the maximum area of an island in  grid . If there is no island, return  0 .   Example 1:   Example 1: Input: grid = [[0,0,1,0,0,0,0,1,0,0,0,0,0],[0,0,0,0,0,0,0,1,1,1,0,0,0],[0,1,1,0,1,0,0,0,0,0,0,0,0],[0,1,0,0,1,1,0,0,1,0,1,0,0],[0,1,0,0,1,1,0,0,1,1,1,0,0],[0,0,0,0,0,0,0,0,0,0,1,0,0],[0,0,0,0,0,0,0,1,1,1,0,0,0],[0,0,0,0,0,0,0,1,1,0,0,0,0]] Output: 6 Explanation: The answer is not 11, because the island must be connected 4-directionally.   Example 2: Input: grid = [[0,1,1,1,0,0,0,0]] Output: 3 Constraints: ·      ...