摘要：
Given an unsorted array nums, reorder it such that nums[0] < nums[1] > nums[2] < nums[3].... Example 1: Example 2: Note:You may assume all input has v 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：
Given an integer, write a function to determine if it is a power of three. Example 1: Example 2: Example 3: Example 4: Follow up:Could you do it witho 阅读全文
摘要：
You are given an integer array coins representing coins of different denominations and an integer amount representing a total amount of money. Return 阅读全文
