LeetCode – Trapping Rain Water (Java)
Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it is able to trap after raining. For example, given [0,1,0,2,1,0,1,3,2,1,2,1], return 6. Analysis This problem is similar to Candy. It can be solve by scanning from both sides and then get the total. Java … Read more