摘要:
题目: 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 rain 阅读全文
摘要:
题目: Given an unsorted integer array, find the first missing positive integer. For example, Given [1,2,0] return 3, and [3,4,-1,1] return 2. Your algor 阅读全文