Package g0901_1000.s0934_shortest_bridge

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    934 - Shortest Bridge.

    Medium

    You are given an n x n binary matrix grid where 1 represents land and 0 represents water.

    An island is a 4-directionally connected group of 1's not connected to any other 1's. There are exactly two islands in grid.

    You may change 0's to 1's to connect the two islands to form one island.

    Return the smallest number of 0's you must flip to connect the two islands.

    Example 1:

    Input: grid = [0,1,1,0]

    Output: 1

    Example 2:

    Input: grid = [0,1,0,0,0,0,0,0,1]

    Output: 2

    Example 3:

    Input: grid = [1,1,1,1,1,1,0,0,0,1,1,0,1,0,1,1,0,0,0,1,1,1,1,1,1]

    Output: 1

    Constraints:

    • n == grid.length == grid[i].length

    • 2 <= n <= 100

    • grid[i][j] is either 0 or 1.

    • There are exactly two islands in grid.

    • 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 shortestBridge(Array<IntArray> grid)

      • Methods inherited from class java.lang.Object

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