1. 车载USB充电器. 2. 轮胎检测,备胎充气. 3. 给刹车片加润滑油. 3. 给娃办身份证. 4. 取公积金. 5. 入职准备材料.…

1A~,但后来看人家的代码好像又写臭了,T^T... Problem A: Educational journey The University of Calgary team qualified for the 28th ACM International Collegiate Programming Contest World Finals in Prague, Czech Republic. Just by using the initials of team members they g…

A Sweet Journey Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=5477 Description Master Di plans to take his girlfriend for a travel by bike. Their journey, which can be seen as a line segment of length L, is a r…

A Sweet Journey Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 25    Accepted Submission(s): 12 Problem Description Master Di plans to take his girlfriend for a travel by bike. Their journey,…

什么时候需要 Looper Looper用于封装了android线程中的消息循环,默认情况下一个线程是不存在消息循环(message loop)的,需要调用Looper.prepare()来给线程创建一个消息循环,调用Looper.loop()来使消息循环起作用,使用Looper.prepare()和Looper.loop()创建了消息队列就可以让消息处理在该线程中完成. 使用Looper需要注意什么 写在Looper.loop()之后的代码不会被立即执行,当调用后mHandler.getLoo…

此错误是由于版本造成的,如果使用mybatis3.4版本以上,配置拦截器规则应增加Intger @Intercepts({ @Signature( type= StatementHandler.class, method = "prepare", args = {Connection.class,Integer.class} ) })…

prepare可以解决大访问量的网站给数据库服务器所带来的负载和开销,本文章通过实例向大家介绍预查询prepare与普通查询的性能对比,需要的朋友可以参考一下. 实例代码如下: <?php class timer { public $StartTime = 0; public $StopTime = 0; public $TimeSpent = 0; function start(){ $this->StartTime = microtime(); } function stop(){ $th…

在子线程中new一个Handler为什么会报以下错误? java.lang.RuntimeException:  Can't create handler inside thread that has not called Looper.prepare()  这是因为Handler对象与其调用者在同一线程中,如果在Handler中设置了延时操作,则调用线程也会堵塞.每个Handler对象都会绑定一个Looper对象,每个Looper对象对应一个消息队列(MessageQueue).如果在创建Ha…

Xtrabackup Xtrabackup包含两个主要的工具,即xtrabackup和innobackupex,二者区别如下:  • xtrabackup只能备份innodb和xtradb引擎表,而不能备份MyISAM表  • innobackupex是一个封装了xtrabackup的Perl脚本,支持同时备份innodb和MyISAM,但在对MyISAM备份时需要加一个全局的读锁 创建用户赋予权限 CREATE USER 'backup'@'localhost' IDENTIFIED BY '…

C. Journey time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Recently Irina arrived to one of the most famous cities of Berland — the Berlatov city. There are n showplaces in the city, numbe…