Package g1601_1700.s1642_furthest_building_you_can_reach

Class Solution

java.lang.Object
g1601_1700.s1642_furthest_building_you_can_reach.Solution
public class Solution extends java.lang.Object
1642 - Furthest Building You Can Reach.

Medium

You are given an integer array heights representing the heights of buildings, some bricks, and some ladders.

You start your journey from building 0 and move to the next building by possibly using bricks or ladders.

While moving from building i to building i+1 ( 0-indexed ),

  • If the current building’s height is greater than or equal to the next building’s height, you do not need a ladder or bricks.
  • If the current building’s height is less than the next building’s height, you can either use one ladder or (h[i+1] - h[i]) bricks.

Return the furthest building index (0-indexed) you can reach if you use the given ladders and bricks optimally.

Example 1:

Input: heights = [4,2,7,6,9,14,12], bricks = 5, ladders = 1

Output: 4

Explanation: Starting at building 0, you can follow these steps:

  • Go to building 1 without using ladders nor bricks since 4 >= 2.

  • Go to building 2 using 5 bricks. You must use either bricks or ladders because 2 < 7.

  • Go to building 3 without using ladders nor bricks since 7 >= 6.

  • Go to building 4 using your only ladder. You must use either bricks or ladders because 6 < 9.

It is impossible to go beyond building 4 because you do not have any more bricks or ladders.

Example 2:

Input: heights = [4,12,2,7,3,18,20,3,19], bricks = 10, ladders = 2

Output: 7

Example 3:

Input: heights = [14,3,19,3], bricks = 17, ladders = 0

Output: 3

Constraints:

  • 1 <= heights.length <= 105
  • 1 <= heights[i] <= 106
  • 0 <= bricks <= 109
  • 0 <= ladders <= heights.length

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    furthestBuilding(int[] heights, int bricks, int ladders)
     

    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

    • furthestBuilding

      public int furthestBuilding(int[] heights, int bricks, int ladders)