//两道大水……哦不 两道结论题 结论:二部图的最小覆盖数=二部图的最大匹配数 有向图的最小覆盖数=节点数-二部图的最大匹配数 //hdu 1150 #include<cstdio> #include<iostream> #include<cmath> #include<algorithm> #include<cstring> #include<cstdlib> #include<queue> #include<ve…

二分图:https://blog.csdn.net/c20180630/article/details/70175814 https://blog.csdn.net/flynn_curry/article/details/52966283 匈牙利算法模板:https://blog.csdn.net/sunny_hun/article/details/80627351 例题:hdu 1150 Machine Schedule 参考:https://www.cnblogs.com/qq-star/p…

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.…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1150 有两个机器a和b,分别有n个模式和m个模式.下面有k个任务,每个任务需要a的一个模式或者b的一个模式完成. 两个机器初始都是0模式,一个机器转换一个模式需要重启一次.问你最少需要重启几次能完成所有的任务. 不太明显的二分匹配,将每个任务的两个模式连线,大概就能看出来这是个最小点覆盖问题. /* 将下面任务的a状态和b状态连边,线的个数就是任务个数. 要使重启次数最少,那么就要使选择的点最少而且…

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…

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.…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1150 Machine Schedule Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 6733    Accepted Submission(s): 3375 Problem Description As we all know, mach…

http://acm.hdu.edu.cn/showproblem.php?pid=1150 有两种机器,A机器有n种模式,B机器有m种模式,现在有k个任务需要执行,没切换一个任务机器就需要重启一次, 如果任务i在机器A上执行,A机器需要一个对应的模式A,如果在机器B上执行,机器A需要一个模式B. 一直就是机器A在切换模式,现在让你安排一种合理的任务执行顺序,让机器重启次数最少. 每个任务之间连一条边.二分图的最小顶点覆盖就是求最少的点可以连接所有的边,然后转化成最大匹配即可. 这题就是初始状态…

pid=1150">Machine Schedule Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 5424    Accepted Submission(s): 2691 Problem Description As we all know, machine scheduling is a very classical pro…

Machine Schedule Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 5379    Accepted Submission(s): 2664 Problem Description As we all know, machine scheduling is a very classical problem in comput…