题意:x,y两台机器各在一边,分别有模式x0 x1 x2 ... xn, y0 y1 y2 ... ym, 现在对给定K个任务,每个任务可以用xi模式或者yj模式完成,同时变换一次模式需要重新启动一次机器,问最少的启动次数链接:http://acm.hdu.edu.cn/showproblem.php?pid=1150思路:稳定转化成给定k条边,使得每一条边最少被一个点覆盖,即最小覆盖点集最后求出的最大匹配数需要减一才是启动次数,注意到刚开始两台机器都是在0模式下,所以没有0模式,最后就不需要减…

题意: 有两台不同机器A和B,他们分别拥有各种运行模式1~n和1~m.现有一些job,需要在某模式下才能完成,job1在A和B上需要的工作模式又可能会不一样.两台机器一开始处于0模式,可以切换模式,但是仅在0模式才有切换权,可以通过重启机器回到0模式.现在有一堆job,要多少次重启机器才可以完成任务. 思路: 分析下,很明显,只要求重启次数,那么和时间无关(可以完全由1个机器来干活),只要同个模式的任务能在一块执行掉就节省重启次数了,所有模式一样的任务只耗费1次重启.但是两台机器协作可能重启次数…

Machine Schedule Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 5817    Accepted Submission(s): 2932 Problem Description As we all know, machine scheduling is a very classical problem in comput…

Machine Schedule Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 13731   Accepted: 5873 Description As we all know, machine scheduling is a very classical problem in computer science and has been studied for a very long history. Scheduli…

Machine Schedule Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 11958   Accepted: 5094 Description As we all know, machine scheduling is a very classical problem in computer science and has been studied for a very long history. Scheduli…

题目地址:UVA1194 Machine Schedule 二分图最小覆盖模型的要素 每条边有两个端点,二者至少选择一个.简称 \(2\) 要素. \(2\) 要素在本题中的体现 每个任务要么在 \(A\) 上以 \(a_i\) 模式执行,要么在机器 \(B\) 上以 \(b_i\) 模式执行. 把 \(A,B\) 的 \(m\) 种模式分别作为 \(m\) 个左部点和右部点,每个任务作为边连接左部 \(a_i\) 节点和右部 \(b_i\) 节点. 求这张二分图的最小覆盖,时间复杂度为 \(O…

Machine Schedule Time Limit: 1 Sec  Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=1150 Description As we all know, machine scheduling is a very classical problem in computer science and has been studied for a very long history.…

Machine Schedule Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 4122    Accepted Submission(s): 2005 Problem DescriptionAs we all know, machine scheduling is a very classical problem in compute…

题目大意:机器调度问题,同一个任务可以在A,B两台不同的机器上以不同的模式完成.机器的初始模式是mode_0,但从任何模式改变成另一个模式需要重启机器.求完成所有工作所需最少重启次数. =================================================== 对于任务(i,x,y),我们在A机mode_x与B机mode_y之间连一条边.这样,题目就变成了一个二分图,我们的目的是完成所有任务,即覆盖所有线段,题目要求选择最少的点,使得每个线段至少有一个端点被选中(这个…

Machine Schedule Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 6701    Accepted Submission(s): 3358 Problem Description As we all know, machine scheduling is a very classical problem in comput…