Created
March 7, 2020 09:45
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| def trap(heights: List[int]) -> int: | |
| left_h = 0 | |
| total_volume = 0 | |
| for i in range(1, len(heights)-1): | |
| h = heights[i] | |
| left_h = max(heights[i-1], left_h) | |
| right_h = max(heights[i+1:], default=0) | |
| volume = max(0, min(left_h, right_h) - h) | |
| total_volume += volume | |
| return total_volume |
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