Trapping Rain Water
HardP1Coding
height[i] is the height of an elevation bar of width 1. After rain, water collects between the bars. Return the total units of water trapped.
Example 1
- Input
- height = [0,1,0,2,1,0,1,3,2,1,2,1]
- Output
- 6
Example 2
- Input
- height = [4,2,0,3,2,5]
- Output
- 9
Example 3
- Input
- height = [3,0,0,2,0,4]
- Output
- 10
Constraints
- 1 <= height.length <= 2 * 10^4
- 0 <= height[i] <= 10^5
Hints
Give it a real attempt first. Run shows which examples fail.
Saved automatically
Run checks the 3 visible tests, Submit all 8. ⌘Enter runs, ⌘⇧Enter submits.