The Producer-Consumer Problem Presenter Notes: 生产者消费者问题(英语:Producer-consumer problem),也称有限缓冲问题(英语:Bounded-buffer problem),是一个多线程同步问题的经典案例.该问题描述了两个共享固定大小缓冲区的线程——即所谓的“生产者”和“消费者”——在实际运行时会发生的问题.生产者的主要作用是生成一定量的数据放到缓冲区中,然后重复此过程.与此同时,消费者也在缓冲区消耗这些数据.该问题的关键就是…
转自:http://www.cnblogs.com/yanlingyin/archive/2012/03/05/2379199.html 开篇 学习任何一门编程语言,都会从hello world 开始.对于一门从未接触过的语言,在短时间内我们都能用这种语言写出它的hello world. 然而,对于hello world 这个简单程序的内部运行机制,我相信还有很多人都不是很清楚. hello world 这些信息是如何通显示器过显示的? cpu执行的代码和程序中我们写的的代码肯定不一样,她是什么…
Prime Ring Problem Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 42600 Accepted Submission(s): 18885 Problem Description A ring is compose of n circles as shown in diagram. Put natural num…
Prime Ring Problem Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 20105 Accepted Submission(s): 9001 Problem Description A ring is compose of n circles as shown in diagram. Put natural numb…
*本文主要记录和分享学习到的知识,算不上原创. *参考文献见链接. 旅行商问题.背包问题都是0-1规划问题中最为经典的问题. 通常来说,当我们学习并熟悉一种求解混合整数问题的技巧时,可以用这种技巧来求解旅行商问题或者背包问题,以此来验证自己对该技巧的掌握程度. 目录 什么是旅行商问题 旅行商问题的数学模型 什么是旅行商问题 定义 Given a list of cities and the distances between each pair of cities, what is the sh…
The King’s Problem Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 4080 Accepted Submission(s): 1430 Problem Description In the Kingdom of Silence, the king has a new problem. There are N cit…
任意门:http://acm.hdu.edu.cn/showproblem.php?pid=1757 A Simple Math Problem Time Limit: 3000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 6621 Accepted Submission(s): 4071 Problem Description Lele now is thin…
Prime Ring Problem A ring is compose of n circles as shown in diagram. Put natural number 1, 2, ..., n into each circle separately, and the sum of numbers in two adjacent circles should be a prime. Note: the number of first circle should always be 1.…
Bracket Sequences Concatenation Problem time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output A bracket sequence is a string containing only characters "(" and ")". A regular bra…
Prime Ring Problem Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 74594 Accepted Submission(s): 31690 Problem Description A ring is compose of n circles as shown in diagram. Put natural numb…
The C10K problem 如今的web服务器需要同时处理一万个以上的客户端了,难道不是吗?毕竟如今的网络是个big place了. 现在的计算机也很强大了,你只需要花大概$1200就可以买一个1000MHz的处理器,2G的内存, 1000Mbit/sec的网卡的机器.让我们来看看--20000个客户,每个为50KHz,100Kbyes和 50Kbit/sec,那么没有什么比为这两万个客户端的每个每秒从硬盘读取4千字节然后发送到网络上 去更消耗资源的了.可以看出硬件不再是瓶颈了. (Tha…