1550: Fiber Communications  Time Limit(Common/Java):1000MS/10000MS     Memory Limit:65536KByteTotal Submit: 3            Accepted:2 Description Farmer John wants to connect his N (1 <= N <= 1,000) barns (numbered 1..N) with a new fiber-optic network…

Fiber Communications Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 3804   Accepted: 1160 Description Farmer John wants to connect his N (1 <= N <= 1,000) barns (numbered 1..N) with a new fiber-optic network. However, the barns are loc…

Fiber Communications 总时间限制:  1000ms 内存限制:  65536kB 描述 Farmer John wants to connect his N (1 <= N <= 1,000) barns (numbered 1..N) with a new fiber-optic network. However, the barns are located in a circle around the edge of a large pond, so he can on…

Fiber Communications Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 4236   Accepted: 1276 Description Farmer John wants to connect his N (1 <= N <= 1,000) barns (numbered 1..N) with a new fiber-optic network. However, the barns are loc…

原题地址:http://poj.org/problem?id=1944 题目大意:有n个点排成一圈,可以连接任意两个相邻的点,给出 p 对点,要求这 p 对点必须直接或间接相连,求最少的连接边数 数据范围:n <= 1000, p <= 10000 算法分析: 一开始当最小生成树做的,才发现自己 SB 了…… 先考虑不是环形而是线形的结构,直接贪心连接每两个点之间的所有点就好了.这样我们可以枚举环形的断点,然后逐次贪心,求最小解即可 很多同学在贪心的时候应用了线段树是复杂度高达O(np log…

Description Farmer John wants to connect his N (1 <= N <= 1,000) barns (numbered 1..N) with a new fiber-optic network. However, the barns are located in a circle around the edge of a large pond, so he can only connect pairs of adjacent barns. The ci…

题意 在一个有N(1 ≤ N ≤ 1,000)个点环形图上有P(1 ≤ P ≤ 10,000)对点需要连接.连接只能连接环上相邻的点.问至少需要连接几条边. 思路 突破点在于最后的结果一定不是一个环!所以我们枚举断边,则对于P个连接要求都只有唯一的方法:如果一个pair的两个端点在断点两侧,就分成[0,left],[right,N];否则就是[left, right].这里区间以0开头是要考虑left=1.right=N的情况,至少得有个边([0, 1])表示N连向1的情况不是么. 处理一个区间…

杭电ACM分类: 1001 整数求和 水题1002 C语言实验题——两个数比较 水题1003 1.2.3.4.5... 简单题1004 渊子赛马 排序+贪心的方法归并1005 Hero In Maze 广度搜索1006 Redraiment猜想 数论:容斥定理1007 童年生活二三事 递推题1008 University 简单hash1009 目标柏林 简单模拟题1010 Rails 模拟题(堆栈)1011 Box of Bricks 简单题1012 IMMEDIATE DECODABILITY…

转载:from http://blog.csdn.net/qq_28236309/article/details/47818349 基础题:1000.1001.1004.1005.1008.1012.1013.1014.1017.1019.1021.1028.1029. 1032.1037.1040.1048.1056.1058.1061.1070.1076.1089.1090.1091.1092.1093. 1094.1095.1096.1097.1098.1106.1108.1157.116…

转自 https://segmentfault.com/a/1190000006079389?from=groupmessage&isappinstalled=0 简介 说到协程(Coroutine),很多人会想到go,lua,erlang等语言,其实JVM上也有蛮多的实现,如PicoThread,Kilim,Quasar等,本文主要介绍其中一种Coroutine实现 -- Quasar Fiber,Quasar Fiber相对来说流行度更好一些,如果之前没有接触过协程(用户级轻量级线程),可以…

一.背景 最近在家里捣鼓一个公司自己搭建的demo的时候,发现程序一启动就会出现CommunicationsException: Communications link failure错误,经过一番排查最后发现是数据库url写错造成的,这个过程中也对出现这个错误的解决思路有了一些自己的理解,现和大家分享.该错误的具体信息如下: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure…

最近在项目上遇到一个问题,需要能够在程序中获取Lync会议的链接地址.Lync是微软出品的一套即时通信(IM)客户端软件,配合Microsoft Lync Server使用,其前身是Microsoft Office Communicator(MOC).与Live Messenger相比,Lync更适合企业内部使用,因为它还具备一定的与企业级应用组件进行整合的功能.在Microsoft Office 2010/2013中,Lync已成为Office中的一个套件. 在企业内部使用Outlook和Ly…

09:00:30.307 [http-8080-6] ERROR org.hibernate.transaction.JDBCTransaction -JDBC begin failed com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet successfully received from the server was 56,237,340 mi…

12.1 纤程对象的介绍 (1)纤程与线程的比较 比较 线程(Thread) 纤程(Fiber) 实现方式 是个内核对象 在用户模式中实现的一种轻量级的线程,是比线程更小的调度单位. 调度方式 由Microsoft定义的算法来调度,操作系统对线程了如指掌.内核对线程的调度是抢占式的. 由我们自己调用SwitchToFiber来调度,内核对纤程一无所知.线程一次只能执行一个纤程代码,纤程间的调度不是抢占式的. 备注 ①一个线程可以包含一个或多个纤程.操作系统随时可能夺走纤程所在线程的运行.当线程被…

I was recently invited to speak at a conference in Singapore on Effective Project Communications. I'm unable to attend, so I wanted to share my insights on this very important topic in a blog entry. As a Project Manager, communication will occur in m…

-- 查询mysql 数据库链接空闲时间持有最大空闲时间,单位为秒 SHOW VARIABLES WHERE VAriable_name = 'interactive_timeout'; -- 会出现wait_timeout与该参数意思相近,修改时,一起修改 SHOW VARIABLES WHERE VAriable_name = '%timeout'; -- 解决问题 com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Commun…

MySQL默认一个连接空闲8小时候就会自动断开,而这时程序以为连接还能使用,然后在使用的时候就会出现Communications link failure异常. 这时需要进行两步设置,有时候只设置MySQL就可以了. 一.在MySQL的配置文件(linux配置文件是my.cnf,windows配置文件为my.ini)中添加以下两行(默认值为28800,下面的值代表一年.听说windows下的MySQL不支持一年,可以适当减少尝试) wait_timeout=31536000 interactiv…

Original:http://www.intertech.com/Blog/android-non-ui-to-ui-thread-communications-part-3-of-5/ Continuing my series on Android non-UI thread-to-UI thread communications, this post covers use of the Handler Framework to facilitate the communications. …

Original:http://www.intertech.com/Blog/android-non-ui-to-ui-thread-communications-part-2-of-5/ his is the second part of my series of blog posts on Android non-UI thread-to-UI thread communications. See herefor the start of the series.  As a refreshe…

original:http://www.intertech.com/Blog/android-non-ui-to-ui-thread-communications-part-1-of-5/ ANDROID UI THREAD AND ANR On the Android platform, applications operate, by default, on one thread.  This thread is called the UI thread.  It is often call…

使用Connector/J连接MySQL数据库,程序运行较长时间后就会报以下错误: Communications link failure,The last packet successfully received from the server was *** millisecond ago.The last packet successfully sent to the server was ***  millisecond ago. 其中错误还会提示你修改wait_timeout或是使用C…

一.报错的问题: 测试环境在做压力测试的时候爆出错误 com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure INFO | jvm 1 | 2013/10/24 14:22:28 | INFO | jvm 1 | 2013/10/24 14:22:28 | The last packet successfully received from the server was 26,071…

http://blog.chinaunix.net/uid-21084809-id-2215376.html Processes, kernel threads, user threads, and fibers Process 1.9.2 进程的创建 pid_t fork(void) 功能:创建子进程. fork 被调用一次,却返回两次.**先返回parent process, 后返回child process** 它可能有三种不同的返回值: - 在父进程中,fork返回新创建的子进程的PID…

最近在用一个MySQL的Java连接池的过程中,连接一晚上不释放,第二天就会造成超时的错误,查了一下原因,原来是因为MySQL默认的空闲等待时间是8个小时,一旦空闲超过8个小时,就会抛出异常.异常文本如下: com.mysql.jdbc.CommunicationsException MESSAGE: Communications link failure due to underlying exception: ** BEGIN NESTED EXCEPTION ** java.net.Soc…

Ubuntu 版本: Ubuntu server 10.10 在2016-03-26 上午时,拆开公司一台server电脑的CPU风扇不转,电源都烧掉了(潮湿的原因)... 在2016-03-28 打算把他弄好,于是和另外一个同事,把之前同事的电脑,拿来做server,可是闲置的只有一台可用了,换了硬盘,换了内存条.插上网线,网线灯不亮,因为是网卡坏了,要出钱买独立网卡,可是不想花钱去买,最后还是相信是驱动的原因. 在使用 lspci 查看网卡驱动,而且ifconfig命令只会,只有127.0.…

使用Connector/J连接MySQL数据库,程序运行较长时间后就会报以下错误: Communications link failure,The last packet successfully received from the server was *** millisecond ago.The last packet successfully sent to the server was *** millisecond ago. 其中错误还会提示你修改wait_timeout或是使用Co…

Fiber Network Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 3328   Accepted: 1532 Description Several startup companies have decided to build a better Internet, called the "FiberNet". They have already installed many nodes that ac…

# #错误日志 2016-11-10 16:19:20,834 ERROR [org.quartz.core.JobRunShell] - Job DEFAULT.jobtask threw an unhandled Exception: org.springframework.scheduling.quartz.JobMethodInvocationFailedException: Invocation of method 'execute' on target class [class co…

原文链接-https://github.com/AlloyTeam/omi/tree/master/tutorial 写在前面 Omi框架在架构设计的时候就决定把update的控制权交给了开发者,视灵活性比生命还重要.不然的话,如果遇到React Fiber要解决的这类问题的话,就需要推翻原有架构重新搞了. React Fiber 先引用下我们团队小鲜肉Stark伟-复旦大四 / 腾讯@AlloyTeam在知乎上的回答 React 的核心思想是每次对于界面 state 的改动,都会重新渲染整个…

不多说,直接上干货! 问题详情 [hadoop@bigdatamaster oozie--cdh5.5.4]$ bin/ooziedb.sh create -sqlfile oozie.sql -run DB Connection [hadoop@bigdatamaster oozie--cdh5.5.4]$ bin/ooziedb.sh create -sqlfile oozie.sql -run DB Connection setting CATALINA_OPTS="$CATALINA_O…