Package g0101_0200.s0200_number_of_islands

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    200 - Number of Islands\.

    Medium

    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","1"

    ]

    Output: 3

    Constraints:

    • m == grid.length

    • n == grid[i].length

    • 1 <= m, n <= 300

    • grid[i][j] is '0' or '1'.

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final Integer numIslands(Array<CharArray> grid)

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait