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摘要： 1034 Head of a Gang One way that the police finds the head of a gang is to check people's phone calls. If there is a phone call between A and B, we sa 阅读全文

摘要： 1013 Battle Over Cities 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 hig 阅读全文

摘要： 1021 Deepest Root 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 su 阅读全文

摘要： 数据库简答题总结 简述什么是数据库？什么是DBMS？什么是数据库系统？ 答：数据库是长期存储在计算机内，有组织的，可共享的大量数据的集合；DBMS是数据库管理系统，位于用户和操作系统之间的一层数据管理软件，主要功能包括数据定义功能，数据组织存储和管理，数据操纵功能，数据库事务管理和运行管理，数据库的 阅读全文

摘要： 最小函数依赖解法总结 考研复试要学习数据库，数据库里面好多算法和知识点单看教科书很难理解，然后我就结合网上的博客和课本（数据库系统概论）对一些常考算法做一些总结，欢迎各位批评指正。 **最小函数依赖集概念：**如果函数依赖集F满足下列条件，则称F为一个极小函数依赖集。 F中任意函数依赖的右部仅含有一 阅读全文

摘要： 1022 Digital Library A Digital Library contains millions of books, stored according to their titles, authors, key words of their abstracts, publishers 阅读全文

摘要： 1071 Speech Patterns People often have a preference among synonyms of the same word. For example, some may prefer "the police", while others may prefe 阅读全文

摘要： 1100 Mars Numbers People on Mars count their numbers with base 13: Zero on Earth is called “tret” on Mars. The numbers 1 to 12 on Earch is called “jan 阅读全文

摘要： 1060 Are They Equal If a machine can save only 3 significant digits, the float numbers 12300 and 12358.9 are considered equal since they are both save 阅读全文

摘要： 1063 Set Similarity Given two sets of integers, the similarity of the sets is defined to be Nc/Nt*100%, where Nc is the number of distinct common numb 阅读全文