SteveYu - 博客园

2020年1月26日

PAT Advanced 1099 Build A Binary Search Tree (30分)

摘要： A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only nodes 阅读全文

posted @ 2020-01-26 14:39 SteveYu 阅读(147) 评论(0) 推荐(0) 编辑

PAT Advanced 1064 Complete Binary Search Tree (30分)

摘要： A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only nodes 阅读全文

posted @ 2020-01-26 13:07 SteveYu 阅读(149) 评论(0) 推荐(0) 编辑

2020年1月25日

PAT Advanced 1092 To Buy or Not to Buy (20分)

摘要： Eva would like to make a string of beads with her favorite colors so she went to a small shop to buy some beads. There were many colorful strings of b 阅读全文

posted @ 2020-01-25 15:47 SteveYu 阅读(143) 评论(0) 推荐(0) 编辑

PAT Advanced 1096 Consecutive Factors (20分)

摘要： Among all the factors of a positive integer N, there may exist several consecutive numbers. For example, 630 can be factored as 3×5×6×7, where 5, 6, a 阅读全文

posted @ 2020-01-25 14:59 SteveYu 阅读(156) 评论(0) 推荐(0) 编辑

PAT Advanced 1084 Broken Keyboard (20分)

摘要： On a broken keyboard, some of the keys are worn out. So when you type some sentences, the characters corresponding to those keys will not appear on sc 阅读全文

posted @ 2020-01-25 11:00 SteveYu 阅读(129) 评论(0) 推荐(0) 编辑

PAT Advanced 1071 Speech Patterns (25分)

摘要： People often have a preference among synonyms of the same word. For example, some may prefer "the police", while others may prefer "the cops". Analyzi 阅读全文

posted @ 2020-01-25 10:28 SteveYu 阅读(157) 评论(0) 推荐(0) 编辑

2020年1月23日

Servlet复习

摘要： Servlet复习 1.Servlet执行原理 1.tomcat接受客户端的请求，去web.xml解析URL路径，访问Servlet的资源路径 2.根据资源路径，和servlet name，找到servlet class 3.tomcat将全类名对应字节码加载进内存 Class.forName() 阅读全文

posted @ 2020-01-23 18:52 SteveYu 阅读(163) 评论(0) 推荐(0) 编辑

PAT Advanced 1101 Quick Sort (25分)

摘要： There is a classical process named partition in the famous quick sort algorithm. In this process we typically choose one element as the pivot. Then th 阅读全文

posted @ 2020-01-23 12:34 SteveYu 阅读(145) 评论(0) 推荐(0) 编辑

PAT Advanced 1043 Is It a Binary Search Tree (25分)

摘要： A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only nodes 阅读全文

posted @ 2020-01-23 00:23 SteveYu 阅读(199) 评论(0) 推荐(0) 编辑

2020年1月22日

HTTP协议

摘要： Http协议 1.介绍 HTTP：超文本传输协议作用：规范浏览器与服务器的交互特点：简单快速灵活无连接（HTTP 1.1版本后支持可持续性连接无状态支持B/S和C/S架构 2.交互流程建立连接 3次握手，Client发送Syn标志位置，Server回应Ack+Syn，Client在此阅读全文

posted @ 2020-01-22 19:07 SteveYu 阅读(178) 评论(0) 推荐(0) 编辑

PAT Advanced 1031 Hello World for U (20分)

摘要： Given any string of N (≥) characters, you are asked to form the characters into the shape of U. For example, helloworld can be printed as: h d e l l r 阅读全文

posted @ 2020-01-22 13:05 SteveYu 阅读(155) 评论(0) 推荐(0) 编辑

2020年1月21日

自然码双拼快速记忆方案

摘要：自然码双拼快速记忆方案 1.zh ch sh zh——v像树枝 ch——i像尺子 sh——u像试管举例： uu vi——树枝 ii zi——尺子 ui gr——试管 2.三个故事记住双拼故事1: 分行追贼来求警，靠您 ff hh vv zz ll qq jj kk nn fen hang zhu 阅读全文

posted @ 2020-01-21 23:18 SteveYu 阅读(6608) 评论(0) 推荐(0) 编辑

macOS 原生输入法设置自然码

摘要：只需在终端内输入以下命令即可： defaults write com.apple.inputmethod.CoreChineseEngineFramework shuangpinLayout 5 系统为macOS Catalina 10.15.2 参考博客：https://www.dazhuanla 阅读全文

posted @ 2020-01-21 21:41 SteveYu 阅读(1466) 评论(0) 推荐(0) 编辑

PAT Advanced 1086 Tree Traversals Again (25分)

摘要： An inorder binary tree traversal can be implemented in a non-recursive way with a stack. For example, suppose that when a 6-node binary tree (with the 阅读全文

posted @ 2020-01-21 12:04 SteveYu 阅读(191) 评论(0) 推荐(0) 编辑

PAT Advanced 1050 String Subtraction (20分)

摘要： Given two strings S1 and S2, S=S1−S2 is defined to be the remaining string after taking all the characters in S2 from S1. Your task 阅读全文

posted @ 2020-01-21 11:36 SteveYu 阅读(131) 评论(0) 推荐(0) 编辑

Steve Yu

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