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摘要: PAT甲级: 1136 A Delayed Palindrome (20分) 题干 Look and say sequence is a sequence of integers as the following: where is in [0, 9] except 1. The (n+1)st n 阅读全文
posted @ 2020-05-07 08:27 Herman·H 阅读(174) 评论(0) 推荐(0) 编辑
摘要: PAT甲级: 1136 A Delayed Palindrome (20分) 题干 Consider a positive integer N written in standard notation with k +1 digits a i as a k ⋯ a 1 a 0 with 0≤ a i 阅读全文
posted @ 2020-05-07 08:17 Herman·H 阅读(210) 评论(0) 推荐(0) 编辑
摘要: PAT甲级: 1124 Raffle for Weibo Followers (20分) 题干 John got a full mark on PAT. He was so happy that he decided to hold a raffle(抽奖) for his followers on 阅读全文
posted @ 2020-05-07 08:10 Herman·H 阅读(194) 评论(0) 推荐(0) 编辑
摘要: PAT甲级:1066 Root of AVL Tree (25分) 题干 An AVL tree is a self balancing binary search tree. In an AVL tree, the heights of the two child subtrees of any 阅读全文
posted @ 2020-05-07 08:03 Herman·H 阅读(175) 评论(0) 推荐(0) 编辑
摘要: PAT甲级: 1025 PAT Ranking (25分) 题干 Programming Ability Test (PAT) is organized by the College of Computer Science and Technology of Zhejiang University. 阅读全文
posted @ 2020-05-07 07:52 Herman·H 阅读(191) 评论(0) 推荐(0) 编辑
摘要: PAT甲级:1036 Boys vs Girls (25分) 题干 This time you are asked to tell the difference between the lowest grade of all the male students and the highest gra 阅读全文
posted @ 2020-05-05 09:36 Herman·H 阅读(115) 评论(0) 推荐(0) 编辑
摘要: PAT甲级: 1089 Insert or Merge (25分) 题干 According to Wikipedia: Insertion sort iterates, consuming one input element each repetition, and growing a sorte 阅读全文
posted @ 2020-05-04 23:06 Herman·H 阅读(197) 评论(0) 推荐(1) 编辑
摘要: PAT甲级: 1064 Complete Binary Search Tree (30分) 题干 A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties 阅读全文
posted @ 2020-05-04 22:51 Herman·H 阅读(169) 评论(0) 推荐(0) 编辑
摘要: "navicat 15 破解教程传送门" 阅读全文
posted @ 2020-04-29 19:49 Herman·H 阅读(343) 评论(0) 推荐(0) 编辑
摘要: SQL SQL查询语言概览 SQL数据定义 SQL查询的基本结构 单关系查询 distinct 下面这段语句就能完成一个简单的单关系查询: 而我们有时候的数据单拿一个属性出来,数据是会大量重复的,比如我们执行下列语句: 就会出现大量的重复。 在关系模型的数学定义中,我们不允许关系里有重复的元素。但在 阅读全文
posted @ 2020-04-27 23:46 Herman·H 阅读(433) 评论(0) 推荐(0) 编辑
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