摘要：
Given an array of integers, every element appears three times except for one. Find that single one. Note: Your algorithm should have a linear runtime 阅读全文
摘要：
Given a collection of distinct numbers, return all possible permutations. For example, [1,2,3] have the following permutations: class Solution(object) 阅读全文
摘要：
Given a singly linked list, group all odd nodes together followed by the even nodes. Please note here we are talking about the node number and not the 阅读全文
摘要：
Serialization is the process of converting a data structure or object into a sequence of bits so that it can be stored in a file or memory buffer, or 阅读全文