摘要：
Given a binary tree, flatten it to a linked list in-place.For example,Given 1 / \ 2 5 / \ \ 3 4 6The flattened t... 阅读全文
摘要：
Write a function to find the longest common prefix string amongst an array of strings.找出所有字符串的最长公共前缀。 1 public class Solution { 2 public String lo... 阅读全文
摘要：
Givennnon-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.Fo... 阅读全文