题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=3605 Escape Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 8001    Accepted Submission(s): 1758 Problem Description 2012 If this is the end of th…

Kingdom of Obsession Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 49    Accepted Submission(s): 14 Problem Description There is a kindom of obsession, so people in this kingdom do things very…

#1393 : 网络流三·二分图多重匹配 时间限制:10000ms 单点时限:1000ms 内存限制:256MB 描述 学校的秋季运动会即将开始,为了决定参赛人员,各个班又开始忙碌起来. 小Hi和小Ho作为班上的班干部,统计分配比赛选手的重任也自然交到了他们手上. 已知小Hi和小Ho所在的班级一共有N名学生(包含小Hi和小Ho),编号依次为1..N. 运动会一共有M项不同的比赛,编号为1..M.第i项比赛每个班需要派出m[i]名选手参加. 根据小Hi和小Ho的统计,编号为i的学生表示最多同时参加…

The Perfect StallHal Burch Farmer John completed his new barn just last week, complete with all the latest milking technology. Unfortunately, due to engineering problems, all the stalls in the new barn are different. For the first week, Farmer John r…

HDU 3605 Escape (网络流,最大流,位运算压缩) Description 2012 If this is the end of the world how to do? I do not know how. But now scientists have found that some stars, who can live, but some people do not fit to live some of the planet. Now scientists want you…

题目链接: Hdu 3605  Escape 题目描述: 有n个人要迁移到m个星球,每个星球有最大容量,每个人有喜欢的星球,问是否所有的人都能迁移成功? 解题思路: 正常情况下建图,不会爆内存,但是TLE还是稳稳的.以前只遇到过网络流拆点建图,这个正好是缩点建图.吼吼吼~~~,建图的方式还是值得学习的. 因为星球数目最多十个,那么无论有多少个人,其不同选择也就2^10种咯.把不同的选择作为节点,节点就从10^5减少到了2^10,整整缩小了一个数量级呢.建立源点和汇点,源点和选择链接,边权为这种选…

题意:有N(1<=N<=1e5)个人要移民到M(1<=M<=10)个星球上,每个人有自己想去的星球,每个星球有最大承载人数.问这N个人能否移民成功. 分析:可以用最大流的思路求解该问题,新建源点和汇点,源点与人间加入弧,流量为他想去的星球之和:星球和汇点间加入弧,流量为其承载数量:人和星球间加入弧,流量无限.但是本题中N很大,M却很小,所以想去星球的编号组成的二进制数最多不超过1024,那么可以将N个人缩点.然后跑最大流,满流为N. #include<iostream>…

Escape Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 10382    Accepted Submission(s): 2485 Problem Description 2012 If this is the end of the world how to do? I do not know how. But now scient…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=3605 Escape Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 8944    Accepted Submission(s): 2084 Problem Description 2012 If this is the end of the…

来源:http://acm.hdu.edu.cn/showproblem.php?pid=2063 题意: 有k个组合a,b组合,代表a愿意与b坐过山车,共m个女生 n个男生,问有多少个满意的匹配 题解: 这是一道匈牙利算法的裸题,用递归询问是否能安排好某个女生,如果能就ans++ 注意,在同一回合的询问中,某个女生只寻找一次其它男生,第二次寻找时一定无法找到,直接返回0就行 这是我第二次做这道题,在前几个月已经做过,没想到这就是传说中的二分图  Orz #include<iostream>…