摘要：
Given a list of non negative integers, arrange them such that they form the largest number.For example, given[3, 30, 34, 5, 9], the largest formed num... 阅读全文
摘要：
Given an array where elements are sorted in ascending order, convert it to a height balanced BST.Hide TagsTreeDepth-first Search 实现方法有两种，一种是二叉树自下往上 实... 阅读全文
摘要：
Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; }Populate each next pointe... 阅读全文
摘要：
Implement an iterator over a binary search tree (BST). Your iterator will be initialized with the root node of a BST.Callingnext()will return the next... 阅读全文