随笔 - 1659  文章 - 0  评论 - 100  阅读 - 188万
12 2019 档案
PAT 甲级 1081 Rational Sum (20分)(多个分式相加,gcd忘了)*
摘要:1081 Rational Sum (20分) Given N rational numbers in the form numerator/denominator, you are supposed t... 阅读全文
posted @ 2019-12-24 00:47 蔡军帅 阅读(145) 评论(0) 推荐(0) 编辑
PAT 甲级 1081 Rational Sum (20分)(多个分式相加,gcd忘了)*
摘要:1081 Rational Sum (20分) Given N rational numbers in the form numerator/denominator, you are supposed to calculate their sum. Input Specification: Each 阅读全文
posted @ 2019-12-24 00:47 蔡军帅 阅读(329) 评论(0) 推荐(0) 编辑
初学nodejs express小案例——小小相册(不涉及数据库,非常详细)
摘要:业务简介: 显示文件夹 点击显示相册 上传相册 一、在主页显示文件夹 首先,我们要建立以上的文件夹,其中views用于放模板ejs,uploads里放的是相册文件夹,public是网页所需要的css,js等,node_modules放的是开发要用到的包,models是为数据库而建立的(本次用不到数据 阅读全文
posted @ 2019-12-22 01:25 蔡军帅 阅读(643) 评论(0) 推荐(0) 编辑
初学nodejs express小案例——小小相册(不涉及数据库,非常详细)
摘要:业务简介:显示文件夹 点击显示相册上传相册 一、在主页显示文件夹 首先,我们要建立以上的文件夹,其中views用于放模板ejs,uploads里放的是相册文件夹,public是网页所需要的css,js等,... 阅读全文
posted @ 2019-12-22 01:25 蔡军帅 阅读(249) 评论(0) 推荐(0) 编辑
Callback must be a function. Received undefined
摘要:fs.js:143 throw new ERR_INVALID_CALLBACK(cb); ^TypeError [ERR_INVALID_CALLBACK]: Callback must b... 阅读全文
posted @ 2019-12-22 00:20 蔡军帅 阅读(447) 评论(0) 推荐(0) 编辑
Callback must be a function. Received undefined
摘要:fs.js:143 throw new ERR_INVALID_CALLBACK(cb); ^ TypeError [ERR_INVALID_CALLBACK]: Callback must be a function. Received undefined at makeCallback (fs. 阅读全文
posted @ 2019-12-22 00:20 蔡军帅 阅读(4302) 评论(0) 推荐(0) 编辑
npm 安装包报错 rollbackFailedOptional
摘要:原因事设置的代理错误,删除即可 npm config rm proxynpm config rm https-proxy 阅读全文
posted @ 2019-12-21 23:34 蔡军帅 阅读(3803) 评论(0) 推荐(0) 编辑
npm 安装包报错 rollbackFailedOptional
摘要:原因事设置的代理错误,删除即可npm config rm proxynpm config rm https-proxy 阅读全文
posted @ 2019-12-21 23:34 蔡军帅 阅读(330) 评论(0) 推荐(0) 编辑
PAT 甲级 1074 Reversing Linked List (25 分)(链表部分逆置,结合使用双端队列和栈,其实使用vector更简单呐)...
摘要:1074 Reversing Linked List (25 分) Given a constant K and a singly linked list L, you are supposed to rever... 阅读全文
posted @ 2019-12-16 22:35 蔡军帅 阅读(96) 评论(0) 推荐(0) 编辑
PAT 甲级 1071 Speech Patterns (25 分)(map)
摘要:1071 Speech Patterns (25 分) People often have a preference among synonyms of the same word. For example, s... 阅读全文
posted @ 2019-12-16 22:33 蔡军帅 阅读(87) 评论(0) 推荐(0) 编辑
P3370 【模板】字符串哈希
摘要:题目描述如题,给定N个字符串(第i个字符串长度为Mi,字符串内包含数字、大小写字母,大小写敏感),请求出N个字符串中共有多少个不同的字符串。输入输出格式输入格式: 第一行包含一个整数N,为字符串的个数。接下来N行... 阅读全文
posted @ 2019-12-16 22:32 蔡军帅 阅读(98) 评论(0) 推荐(0) 编辑
PageRank算法原理与Python实现
摘要:一、什么是pagerankPageRank的Page可是认为是网页,表示网页排名,也可以认为是Larry Page(google 产品经理),因为他是这个算法的发明者之一,还是google CEO(^_^)。Pa... 阅读全文
posted @ 2019-12-08 21:35 蔡军帅 阅读(277) 评论(0) 推荐(0) 编辑
PageRank算法原理与Python实现
摘要:一、什么是pagerank PageRank的Page可是认为是网页,表示网页排名,也可以认为是Larry Page(google 产品经理),因为他是这个算法的发明者之一,还是google CEO(^_^)。PageRank算法计算每一个网页的PageRank值,然后根据这个值的大小对网页的重要性 阅读全文
posted @ 2019-12-08 21:35 蔡军帅 阅读(6167) 评论(0) 推荐(0) 编辑
PAT-2019年冬季考试-甲级 7-4 Cartesian Tree (30分)(最小堆的中序遍历求层序遍历,递归建树bfs层序)
摘要:7-4 Cartesian Tree (30分) A Cartesian tree is a binary tree constructed from a sequence of distinct numbers. The tree is heap-ordered, and an inorder t 阅读全文
posted @ 2019-12-08 13:07 蔡军帅 阅读(526) 评论(0) 推荐(0) 编辑
PAT-2019年冬季考试-甲级 7-4 Cartesian Tree (30分)(最小堆的中序遍历求层序遍历,递归建树bfs层序)...
摘要:7-4 Cartesian Tree (30分) A Cartesian tree is a binary tree constructed from a sequence of distinct numbers... 阅读全文
posted @ 2019-12-08 13:07 蔡军帅 阅读(117) 评论(0) 推荐(0) 编辑
PAT-2019年冬季考试-甲级 7-3 Summit (25分) (邻接矩阵存储,直接暴力)
摘要:7-3 Summit (25分) A summit (峰会) is a meeting of heads of state or government. Arranging the rest areas for ... 阅读全文
posted @ 2019-12-08 12:57 蔡军帅 阅读(85) 评论(0) 推荐(0) 编辑
PAT-2019年冬季考试-甲级 7-3 Summit (25分) (邻接矩阵存储,直接暴力)
摘要:7-3 Summit (25分) A summit (峰会) is a meeting of heads of state or government. Arranging the rest areas for the summit is not a simple job. The ideal ar 阅读全文
posted @ 2019-12-08 12:57 蔡军帅 阅读(594) 评论(0) 推荐(0) 编辑
PAT-2019年冬季考试-甲级 7-2 Block Reversing (25分) (链表转置)
摘要:7-2 Block Reversing (25分) Given a singly linked list L. Let us consider every K nodes as a block (if there are less than K nodes at the end of the lis 阅读全文
posted @ 2019-12-08 12:46 蔡军帅 阅读(366) 评论(0) 推荐(0) 编辑
PAT-2019年冬季考试-甲级 7-2 Block Reversing (25分) (链表转置)
摘要:7-2 Block Reversing (25分) Given a singly linked list L. Let us consider every K nodes as a block (if there... 阅读全文
posted @ 2019-12-08 12:46 蔡军帅 阅读(113) 评论(0) 推荐(0) 编辑
PAT-2019年冬季考试-甲级 7-1 Good in C (20分)
摘要:7-1 Good in C (20分) When your interviewer asks you to write "Hello World" using C, can you do as the follo... 阅读全文
posted @ 2019-12-08 12:34 蔡军帅 阅读(109) 评论(0) 推荐(0) 编辑
PAT-2019年冬季考试-甲级 7-1 Good in C (20分)
摘要:7-1 Good in C (20分) When your interviewer asks you to write "Hello World" using C, can you do as the following figure shows? Input Specification: Each 阅读全文
posted @ 2019-12-08 12:34 蔡军帅 阅读(804) 评论(0) 推荐(1) 编辑
PAT 甲级 树专题小结
摘要:1.已知两个序链表建树 先序中序建树 PAT 1086 node *buildTree(vector<int>pre,vector<int>in,int pl,int pr,int il,int ir){ if(pl>pr || il>ir) return NULL; int pos=-1; for 阅读全文
posted @ 2019-12-06 15:40 蔡军帅 阅读(263) 评论(0) 推荐(0) 编辑
PAT 甲级 树专题小结
摘要:1.已知两个序链表建树先序中序建树PAT 1086node *buildTree(vectorpre,vectorin,int pl,int pr,int il,int ir){ if(pl>pr || i... 阅读全文
posted @ 2019-12-06 15:40 蔡军帅 阅读(88) 评论(0) 推荐(0) 编辑
PAT 甲级 1020 Tree Traversals (25分)(后序中序链表建树,求层序)***重点复习
摘要:1020 Tree Traversals (25分) Suppose that all the keys in a binary tree are distinct positive integers. Give... 阅读全文
posted @ 2019-12-06 15:26 蔡军帅 阅读(87) 评论(0) 推荐(0) 编辑
PAT 甲级 1020 Tree Traversals (25分)(后序中序链表建树,求层序)***重点复习
摘要:1020 Tree Traversals (25分) Suppose that all the keys in a binary tree are distinct positive integers. Given the postorder and inorder traversal sequen 阅读全文
posted @ 2019-12-06 15:26 蔡军帅 阅读(283) 评论(0) 推荐(0) 编辑
PAT 甲级 1086 Tree Traversals Again (25分)(先序中序链表建树,求后序)***重点复习
摘要:1086 Tree Traversals Again (25分) An inorder binary tree traversal can be implemented in a non-recursive way with a stack. For example, suppose that wh 阅读全文
posted @ 2019-12-06 14:26 蔡军帅 阅读(406) 评论(0) 推荐(0) 编辑
PAT 甲级 1086 Tree Traversals Again (25分)(先序中序链表建树,求后序)***重点复习...
摘要:1086 Tree Traversals Again (25分) An inorder binary tree traversal can be implemented in a non-recursive wa... 阅读全文
posted @ 2019-12-06 14:26 蔡军帅 阅读(83) 评论(0) 推荐(0) 编辑
PAT 甲级 1076 Forwards on Weibo (30分)(bfs较简单)
摘要:1076 Forwards on Weibo (30分) Weibo is known as the Chinese version of Twitter. One user on Weibo may h... 阅读全文
posted @ 2019-12-05 19:25 蔡军帅 阅读(110) 评论(0) 推荐(0) 编辑
PAT 甲级 1076 Forwards on Weibo (30分)(bfs较简单)
摘要:1076 Forwards on Weibo (30分) Weibo is known as the Chinese version of Twitter. One user on Weibo may have many followers, and may follow many other us 阅读全文
posted @ 2019-12-05 19:25 蔡军帅 阅读(327) 评论(0) 推荐(0) 编辑
PAT 甲级 1075 PAT Judge (25分)(较简单,注意细节)
摘要:1075 PAT Judge (25分) The ranklist of PAT is generated from the status list, which shows the scores of the submissions. This time you are supposed to g 阅读全文
posted @ 2019-12-05 18:29 蔡军帅 阅读(668) 评论(0) 推荐(0) 编辑
PAT 甲级 1075 PAT Judge (25分)(较简单,注意细节)
摘要:1075 PAT Judge (25分) The ranklist of PAT is generated from the status list, which shows the scores of ... 阅读全文
posted @ 2019-12-05 18:29 蔡军帅 阅读(171) 评论(0) 推荐(0) 编辑
PAT 甲级 1080 Graduate Admission (30 分) (简单,结构体排序模拟)
摘要:1080 Graduate Admission (30 分) It is said that in 2011, there are about 100 graduate schools ready to ... 阅读全文
posted @ 2019-12-04 15:20 蔡军帅 阅读(105) 评论(0) 推荐(0) 编辑
PAT 甲级 1080 Graduate Admission (30 分) (简单,结构体排序模拟)
摘要:1080 Graduate Admission (30 分) It is said that in 2011, there are about 100 graduate schools ready to proceed over 40,000 applications in Zhejiang Pro 阅读全文
posted @ 2019-12-04 15:20 蔡军帅 阅读(290) 评论(0) 推荐(0) 编辑
PAT 甲级 1079 Total Sales of Supply Chain (25 分)(简单,不建树,bfs即可)
摘要:1079 Total Sales of Supply Chain (25 分) A supply chain is a network of retailers(零售商), distributors(经销商), and suppliers(供应商)-- everyone involved in mo 阅读全文
posted @ 2019-12-04 15:17 蔡军帅 阅读(386) 评论(0) 推荐(0) 编辑
PAT 甲级 1079 Total Sales of Supply Chain (25 分)(简单,不建树,bfs即可)
摘要:1079 Total Sales of Supply Chain (25 分) A supply chain is a network of retailers(零售商), distributors(经... 阅读全文
posted @ 2019-12-04 15:17 蔡军帅 阅读(113) 评论(0) 推荐(0) 编辑
PAT 甲级 1078 Hashing (25 分)(简单,平方二次探测)
摘要:1078 Hashing (25 分) The task of this problem is simple: insert a sequence of distinct positive integer... 阅读全文
posted @ 2019-12-04 15:11 蔡军帅 阅读(102) 评论(0) 推荐(0) 编辑
PAT 甲级 1078 Hashing (25 分)(简单,平方二次探测)
摘要:1078 Hashing (25 分) The task of this problem is simple: insert a sequence of distinct positive integers into a hash table, and output the positions of 阅读全文
posted @ 2019-12-04 15:11 蔡军帅 阅读(336) 评论(0) 推荐(0) 编辑
PAT 甲级 1077 Kuchiguse (20 分)(简单,找最大相同后缀)
摘要:1077 Kuchiguse (20 分) The Japanese language is notorious for its sentence ending particles. Personal preference of such particles can be considered as 阅读全文
posted @ 2019-12-04 15:08 蔡军帅 阅读(223) 评论(0) 推荐(0) 编辑
PAT 甲级 1077 Kuchiguse (20 分)(简单,找最大相同后缀)
摘要:1077 Kuchiguse (20 分) The Japanese language is notorious for its sentence ending particles. Personal p... 阅读全文
posted @ 2019-12-04 15:08 蔡军帅 阅读(142) 评论(0) 推荐(0) 编辑

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