Class Solution
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- g0401_0500.s0407_trapping_rain_water_ii.Solution
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public class Solution extends Object
407 - Trapping Rain Water II.Hard
Given an
m x n
integer matrixheightMap
representing the height of each unit cell in a 2D elevation map, return the volume of water it can trap after raining.Example 1:
Input: heightMap = [[1,4,3,1,3,2],[3,2,1,3,2,4],[2,3,3,2,3,1]]
Output: 4
Explanation:
After the rain, water is trapped between the blocks. We have two small ponds 1 and 3 units trapped. The total volume of water trapped is 4.
Example 2:
Input: heightMap = [[3,3,3,3,3],[3,2,2,2,3],[3,2,1,2,3],[3,2,2,2,3],[3,3,3,3,3]]
Output: 10
Constraints:
m == heightMap.length
n == heightMap[i].length
1 <= m, n <= 200
0 <= heightMap[i][j] <= 2 * 104
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Constructor Summary
Constructors Constructor Description Solution()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description int
trapRainWater(int[][] heightMap)
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