James Pan

原题网址：https://leetcode.com/problems/wiggle-sort/ Given an unsorted array nums, reorder it in-place such that nums[0] = nums[2] . For example, given nums = [3, 5, 2, 1, 6, 4], one possible ans

原题网址：https://leetcode.com/problems/swap-nodes-in-pairs/ Given a linked list, swap every two adjacent nodes and return its head. For example, Given 1->2->3->4, you should return the list as 2-

原题网址：https://leetcode.com/problems/scramble-string/ Given a string s1, we may represent it as a binary tree by partitioning it to two non-empty substrings recursively. Below is one possible

原题网址：https://leetcode.com/problems/count-of-smaller-numbers-after-self/ You are given an integer array nums and you have to return a new counts array. The counts array has the property where coun