beehard

摘要： 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. Solution: Find left bound and right bound for each element. O(n). 1 class Solution { 2 publi. 阅读全文