Package g0501_0600.s0587_erect_the_fence

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    587 - Erect the Fence.

    Hard

    You are given an array trees where <code>treesi = x<sub>i</sub>, y<sub>i</sub></code> represents the location of a tree in the garden.

    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. You may return the answer in any order.

    Example 1:

    Input: trees = \[\[1,1],2,2,2,0,2,4,3,3,4,2]

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

    Explanation: All the trees will be on the perimeter of the fence except the tree at 2, 2, which will be inside the fence.

    Example 2:

    Input: trees = \[\[1,2],2,2,4,2]

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

    Explanation: The fence forms a line that passes through all the trees.

    Constraints:

    • 1 &lt;= trees.length &lt;= 3000

    • trees[i].length == 2

    • <code>0 <= x<sub>i</sub>, y<sub>i</sub><= 100</code>

    • All the given positions are 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 Array<IntArray> outerTrees(Array<IntArray> trees)

      • Methods inherited from class java.lang.Object

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