In this problem you have to simulate the workflow of one-thread server. There are n queries to process, the i-th will be received at moment ti and needs to be processed for di units of time. All ti are guaranteed to be distinct. When a query appears…

B. Processing Queries 题目连接: http://www.codeforces.com/contest/644/problem/B Description In this problem you have to simulate the workflow of one-thread server. There are n queries to process, the i-th will be received at moment ti and needs to be pro…

B. Processing Queries time limit per test5 seconds memory limit per test256 megabytes inputstandard input outputstandard output In this problem you have to simulate the workflow of one-thread server. There are n queries to process, the i-th will be r…

题意:有一个一维的书架,\(L\)表示在最左端放一本书,\(R\)表示在最右端放一本书,\(?\)表示从左数或从右数,最少数多少次才能得到要找的书. 题解:我们开一个稍微大一点的数组,从它的中间开始模拟,\(L\)就--\(l\)放进去,\(R\)就++\(r\)放进去,然后每次更新某一本书的最新位置,因为后放的肯定离最左侧或最右侧最近,然后两端求差弄个最小值就行. 代码: int q; char c; int idx; int ans; int mp[2*N],now[2*N]; int ma…

https://cdnjs.cloudflare.com/ajax/libs/p5.js/0.5.7/p5.js http://www.box2d.org http://www.jbox2d.org http://github.com/shiffman/PBox2D 第0章 引言 (已看) 第1章 向量 (已看) 第2章 力 (已看) 第3章 震荡  (已看) 第4章 粒子系统 (已看) 第5章 物理函数库 (已看) 第6章 自治智能体 (已看) 第7章 细胞自动机 (已看) 第8章 分形 (已…

1. Introducing the ADO.NET Entity Framework ado.net entity framework 介绍 1 The Entity Relationship Model: Programming Against a Model,Not the Database 实体关系模型:使用模型编程,而非数据库 2 The Entity Data Model: A Client-Side Data Model 试题对象模型:客户端对象模型 3 Entities: Blu…

mysql官方的介绍 In some cases, the server creates internal temporary tables while processing queries. Such a table can be held in memory and processed by the MEMORY storage engine, or stored on disk and processed by the MyISAM storage engine. The server m…

好多人在调优Mysql的时候,总是对open_tables和opend_tables两个参数分别不清. 网上好多解释都是这样的:open_tables:当前打开表的数量opened_tables:当前已经打开表的数量 很简单的解释,可是这两句话看起来有点类似. 下面我来解释一下:open_tables:是当前在缓存中打开表的数量.opened_tables:是mysql自启动起,打开表的数量. 我们知道,假如没有缓存的话,那么mysql服务在每次执行一个语句的时候,都会先打开一个表.当sql语句…

MySQL查询产生临时表的分析 官网说明的地址:http://dev.mysql.com/doc/refman/5.5/en/internal-temporary-tables.html 参考:http://blog.csdn.net/chenchaoxing/article/details/25214397 In some cases, the server creates internal temporary tables while processing queries. Such a t…

原文地址:http://dev.mysql.com/doc/refman/5.7/en/memory-storage-engine.html The MEMORY storage engine (formerly known as HEAP) creates special-purpose tables with contents that are stored in memory. Because the data is vulnerable to crashes, hardware issu…