接雨水
Hard
array
two-pointers
dynamic-programming
stack
monotonic-stack
给定 n 个非负整数表示每个宽度为 1 的柱子的高度图,计算按此排列的柱子,下雨之后能接多少雨水。
示例 1:
输入:height = [0,1,0,2,1,0,1,3,2,1,2,1]
输出:6
解释:上面是由数组 [0,1,0,2,1,0,1,3,2,1,2,1] 表示的高度图,在这种情况下,可以接 6 个单位的雨水(蓝色部分表示雨水)。
示例 2:
输入:height = [4,2,0,3,2,5]
输出:9
提示:
- n == height.length
- 1 <= n <= 2 * 10^4
- 0 <= height[i] <= 10^5
Sample Test Cases
Example 1
Input:
[0,1,0,2,1,0,1,3,2,1,2,1]
Expected Output:
6
Example 2
Input:
[4,2,0,3,2,5]
Expected Output:
9
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