Class Solution

  • All Implemented Interfaces:

    
    public final class Solution
    
                        

    778 - Swim in Rising Water.

    Hard

    You are given an n x n integer matrix grid where each value grid[i][j] represents the elevation at that point (i, j).

    The rain starts to fall. At time t, the depth of the water everywhere is t. You can swim from a square to another 4-directionally adjacent square if and only if the elevation of both squares individually are at most t. You can swim infinite distances in zero time. Of course, you must stay within the boundaries of the grid during your swim.

    Return the least time until you can reach the bottom right square (n - 1, n - 1) if you start at the top left square (0, 0).

    Example 1:

    Input: grid = [0,2,1,3]

    Output: 3 Explanation:

    At time 0, you are in grid location (0, 0).

    You cannot go anywhere else because 4-directionally adjacent neighbors have a higher elevation than t = 0.

    You cannot reach point (1, 1) until time 3.

    When the depth of water is 3, we can swim anywhere inside the grid.

    Example 2:

    Input: grid = [0,1,2,3,4,24,23,22,21,5,12,13,14,15,16,11,17,18,19,20,10,9,8,7,6]

    Output: 16

    Explanation: The final route is shown. We need to wait until time 16 so that (0, 0) and (4, 4) are connected.

    Constraints:

    • n == grid.length

    • n == grid[i].length

    • 1 <= n <= 50

    • <code>0 <= gridj< n<sup>2</sup></code>

    • Each value grid[i][j] is unique.

    • 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 swimInWater(Array<IntArray> grid)
      • Methods inherited from class java.lang.Object

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