Package g2701_2800.s2742_painting_the_walls

Class Solution

java.lang.Object

g2701_2800.s2742_painting_the_walls.Solution

public class Solution
extends Object

2742 - Painting the Walls.<p>Hard</p> <p>You are given two <strong>0-indexed</strong> integer arrays, <code>cost</code> and <code>time</code>, of size <code>n</code> representing the costs and the time taken to paint <code>n</code> different walls respectively. There are two painters available:</p> <ul> <li>A** paid painter** that paints the <code>i^th</code> wall in <code>time[i]</code> units of time and takes <code>cost[i]</code> units of money.</li> <li>A** free painter** that paints <strong>any</strong> wall in <code>1</code> unit of time at a cost of <code>0</code>. But the free painter can only be used if the paid painter is already <strong>occupied</strong>.</li> </ul> <p>Return <em>the minimum amount of money required to paint the</em> <code>n</code> <em>walls.</em></p> <p><strong>Example 1:</strong></p> <p><strong>Input:</strong> cost = [1,2,3,2], time = [1,2,3,2]</p> <p><strong>Output:</strong> 3</p> <p><strong>Explanation:</strong> The walls at index 0 and 1 will be painted by the paid painter, and it will take 3 units of time; meanwhile, the free painter will paint the walls at index 2 and 3, free of cost in 2 units of time. Thus, the total cost is 1 + 2 = 3.</p> <p><strong>Example 2:</strong></p> <p><strong>Input:</strong> cost = [2,3,4,2], time = [1,1,1,1]</p> <p><strong>Output:</strong> 4</p> <p><strong>Explanation:</strong> The walls at index 0 and 3 will be painted by the paid painter, and it will take 2 units of time; meanwhile, the free painter will paint the walls at index 1 and 2, free of cost in 2 units of time. Thus, the total cost is 2 + 2 = 4.</p> <p><strong>Constraints:</strong></p> <ul> <li><code>1 <= cost.length <= 500</code></li> <li><code>cost.length == time.length</code></li> <li><code>1 <= cost[i] <= 10⁶</code></li> <li><code>1 <= time[i] <= 500</code></li> </ul>

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
int	paintWalls(int[] cost, int[] time)

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

paintWalls

public int paintWalls(int[] cost,
 int[] time)