Young Z. Wang

原题描述：Given an input string, reverse the string word by word.For example,Given s = "the sky is blue",return "blue is sky the".实现思路：1. 使用zheng'c

原题描述：https://oj.leetcode.com/problems/single-number/Given an array of integers, every element appears twice except for one. Find that single one.解题思路：

原题描述：

原题描述：https://oj.leetcode.com/problems/reorder-list/

原题描述：https://oj.leetcode.com/problems/copy-list-with-random-pointer/

原题描述：Sort a linked list in O(n log n) time using constant space complexity.实现思路：题目要求 O(n*lgn)的是时间复杂度和常数时间

原题描述：      实现二叉树的遍历。

原题描述：Given a string s and a dictionary of words dict, determine if s can be segmented into a space-separated sequence of one or more dictionary words.For example, givens = "leetcode",dict 

原题描述：https://oj.leetcode.com/problems/word-break-ii/Given a string s and a dictionary of words dict, add spaces in s to construct a sentence where each word is a valid dictionary word.Return

原题描述：Design and implement a data structure for Least Recently Used (LRU) cache. It should support the following operations: get and set.get(key) - Get the value (will always be positive) of

/** * Definition for a point. * class Point { * int x; * int y; * Point() { x = 0; y = 0; } * Point(int a, int b) { x = a; y = b; } * } */public class Solution { private s

原题描述：Given an input string, reverse the string word by word.For example,Given s = "the sky is blue",return "blue is sky the".实现思路：

原题描述：     Have you been asked this question in an interview?

原题描述：https://oj.leetcode.com/problems/single-number-ii/