Package g0001_0100.s0042_trapping_rain_water

Class Solution

java.lang.Object

g0001_0100.s0042_trapping_rain_water.Solution

public class Solution
extends Object

42 - Trapping Rain Water.<p>Hard</p> <p>Given <code>n</code> non-negative integers representing an elevation map where the width of each bar is <code>1</code>, compute how much water it can trap after raining.</p> <p><strong>Example 1:</strong></p> <p><img src="https://assets.leetcode.com/uploads/2018/10/22/rainwatertrap.png" alt="" /></p> <p><strong>Input:</strong> height = [0,1,0,2,1,0,1,3,2,1,2,1]</p> <p><strong>Output:</strong> 6</p> <p><strong>Explanation:</strong> The above elevation map (black section) is represented by array [0,1,0,2,1,0,1,3,2,1,2,1]. In this case, 6 units of rain water (blue section) are being trapped.</p> <p><strong>Example 2:</strong></p> <p><strong>Input:</strong> height = [4,2,0,3,2,5]</p> <p><strong>Output:</strong> 9</p> <p><strong>Constraints:</strong></p> <ul> <li><code>n == height.length</code></li> <li><code>1 <= n <= 2 * 10⁴</code></li> <li><code>0 <= height[i] <= 10⁵</code></li> </ul>

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
int	trap(int[] height)

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

trap

public int trap(int[] height)