282. Max Area of Island
MediumMatrix
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.
Examples
Input: [[1,1,0,0],[1,0,0,1],[0,0,1,1]]
Output: 3
Explanation: Two islands of area 3 each; the maximum is 3.
Constraints
- m == grid.length
- n == grid[i].length
- 1 <= m, n <= 50
- grid[i][j] is either 0 or 1.
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