Package g0501_0600.s0587_erect_the_fence

Class Solution

java.lang.Object
g0501_0600.s0587_erect_the_fence.Solution
public class Solution extends java.lang.Object
587 - Erect the Fence.

Hard

You are given an array trees where trees[i] = [xi, yi] represents the location of a tree in the garden.

You are asked to fence the entire garden using the minimum length of rope as it is expensive. The garden is well fenced only if all the trees are enclosed.

Return the coordinates of trees that are exactly located on the fence perimeter.

Example 1:

Input: points = [[1,1],[2,2],[2,0],[2,4],[3,3],[4,2]]

Output: [[1,1],[2,0],[3,3],[2,4],[4,2]]

Example 2:

Input: points = [[1,2],[2,2],[4,2]]

Output: [[4,2],[2,2],[1,2]]

Constraints:

  • 1 <= points.length <= 3000
  • points[i].length == 2
  • 0 <= xi, yi <= 100
  • All the given points are unique.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    int[][]
    outerTrees(int[][] trees)
     

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • outerTrees

      public int[][] outerTrees(int[][] trees)