Vivi's Blog

摘要： 题目 Notice that the number 123456789 is a 9 digit number consisting exactly the numbers from 1 to 9, with no duplication. Double it we will obtain 2469 阅读全文

摘要： 题目 A Digital Library contains millions of books, stored according to their titles, authors, key words of their abstracts, publishers, and published ye 阅读全文

摘要： 题目 It is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward tha 阅读全文

摘要： 题目 A graph which is connected and acyclic can be considered a tree. The height of the tree depends on the selected root. Now you are supposed to find 阅读全文

摘要： 题目 Suppose that all the keys in a binary tree are distinct positive integers. Given the postorder and inorder traversal sequences, you are supposed to 阅读全文

摘要： 题目 A number that will be the same when it is written forwards or backwards is known as a Palindromic Number. For example, 1234321 is a palindromic num 阅读全文

摘要： 题目 There is a public bike service in Hangzhou City which provides great convenience to the tourists from all over the world. One may rent a bike at an 阅读全文

摘要： 题目 Suppose a bank has K windows open for service. There is a yellow line in front of the windows which devides the waiting area into two parts. All th 阅读全文

摘要： 题目 Suppose a bank has N windows open for service. There is a yellow line in front of the windows which devides the waiting area into two parts. The ru 阅读全文

摘要： 一、基本概念 二叉搜索树 （又叫二叉查找树、二叉排序树），具有以下特点： 1. 节点的左孩子的值小于节点本身； 2. 节点的右孩子的值大于节点本身； 3. 左右子树同样为二叉搜索树； 所以最终效果是: 节点左子树的所有节点的值都小于节点本身； 节点右子树的所有节点的值都大于节点本身； 对二叉搜素树的 阅读全文