此题就是求最大匹配.不过需要判断是否构成二分图.判断的方法是人选一点标记为红色(0),与它相邻的点标记为黑色(1),产生矛盾就无法构成二分图.声明一个vis[],初始化为-1.通过深搜,相邻的点不满足异或关系就结束.如果没被标记,就标记为相邻点的异或. #include<iostream> #include<cstdio> #include<cstring> #include<algorithm> #include<queue> using na…

题目链接:https://vjudge.net/problem/HDU-2444 The Accomodation of Students Time Limit: 5000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 7328    Accepted Submission(s): 3270 Problem Description There are a group o…

The Accomodation of Students Time Limit: 5000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 6424    Accepted Submission(s): 2880 Problem Description There are a group of students. Some of them may know each o…

The Accomodation of Students Time Limit: 5000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3775    Accepted Submission(s): 1771 Problem Description There are a group of students. Some of them may know each ot…

The Accomodation of Students Time Limit: 5000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Problem Description There are a group of students. Some of them may know each other, while others don't. For example, A and B know each o…

The Accomodation of StudentsTime Limit: 5000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 8939    Accepted Submission(s): 3925 Problem DescriptionThere are a group of students. Some of them may know each othe…

题意: 有n个学生,有m对人是认识的,每一对认识的人能分到一间房,问能否把n个学生分成两部分,每部分内的学生互不认识,而两部分之间的学生认识.如果可以分成两部分,就算出房间最多需要多少间,否则就输出No. 思路: 判断是否是二分图,并输出最大匹配数.用'临点填色法'判断,相邻点异色,发现同色则不成立,然后匈牙利算法, 求出个数除2.注:匈牙利算法时间复杂度 '邻接表': O(mn),邻接矩阵: O(n^3). 代码: #include <iostream> #include <stdio…

The Accomodation of Students Time Limit: 5000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 4915    Accepted Submission(s): 2260 Problem Description There are a group of students. Some of them may know each o…

题目链接:http://acm.split.hdu.edu.cn/showproblem.php?pid=2444 Problem Description There are a group of students. Some of them may know each other, while others don't. For example, A and B know each other, B and C know each other. But this may not imply t…

有n个关系,他们之间某些人相互认识.这样的人有m对.你需要把人分成2组,使得每组人内部之间是相互不认识的.如果可以,就可以安排他们住宿了.安排住宿时,住在一个房间的两个人应该相互认识.最多的能有多少个房间住宿的两个相互认识. 先是要判断是否为二部图,然后求最大匹配. 学习一下模板~ #include<cstdio> #include<cstring> #include<vector> #include<algorithm> using namespace s…