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…

The Accomodation of Students Time Limit:1000MS     Memory Limit:32768KB     64bit IO Format:%I64d & %I64u 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 k…

传送门:The Accomodation of Students 题意:有n个学生,m对相互认识的,问能否分成两队,使得每对中没有相互认识的,如果可以求最大匹配,否则输出No. 分析:判断二分图用染色法,然后直接匈牙利算法求最大匹配. #include <cstdio> #include <cstring> #include <string> #include <cmath> #include <iostream> #include <al…

题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=2063  解题思路: 二分图最大匹配模板题. AC代码: #include<stdio.h> ][],match[],book[],z; int dfs(int u); int main() { int t,n,m,sum,i,j,a,b; ) { scanf("%d%d",&n,&m); z=n+m; ;i<=z;i++) ;j<=z;j++) e…

题面 RPG girls今天和大家一起去游乐场玩,终于可以坐上梦寐以求的过山车了.可是,过山车的每一排只有两个座位,而且还有条不成文的规矩,就是每个女生必须找个个男生做partner和她同坐.但是,每个女孩都有各自的想法,举个例子把,Rabbit只愿意和XHD或PQK做partner,Grass只愿意和linle或LL做partner,PrincessSnow愿意和水域浪子或伪酷儿做partner.考虑到经费问题,boss刘决定只让找到partner的人去坐过山车,其他的人,嘿嘿,就站在下面看着…

题目: 题目已经说了是最大二分匹配题, 查了一下最大二分匹配题有两种解法, 匈牙利算法和网络流. 看了一下觉得匈牙利算法更好理解, 然后我照着小红书模板打了一遍就过了. 匈牙利算法:先试着把没用过的左边的点和没用过的右边的点连起来, 如果遇到一个点已经连过就试着把原来的拆掉 把现在这条线连起来看能不能多连上一条线. 总结来说就是试和拆,试的过程很简单,拆的过程由于使用递归写的,很复杂.很难讲清楚,只能看代码自己理会. 代码(有注释): #include <bits\stdc++.h> usin…

http://acm.hdu.edu.cn/showproblem.php?pid=2444 [DFS染色] #include<iostream> #include<cstdio> #include<cstring> #include<string> #include<cmath> #include<algorithm> using namespace std; ; const int maxm=maxn*maxn; struct e…

题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=1068 Problem Description the second year of the university somebody started a study on the romantic relations between the students. The relation "romantically involved" is defined between one girl…

//推断是否为二分图:在无向图G中,假设存在奇数回路,则不是二分图.否则是二分图. //推断回路奇偶性:把相邻两点染成黑白两色.假设相邻两点出现颜色同样则存在奇数回路. 也就是非二分图. # include <stdio.h> # include <string.h> # include <algorithm> using namespace std; int vis[210],map[210][210],cott[210]; int c[210]; int flag,…

Problem Description RPG girls今天和大家一起去游乐场玩,终于可以坐上梦寐以求的过山车了.可是,过山车的每一排只有两个座位,而且还有条不成文的规矩,就是每个女生必须找个个男生做partner和她同坐.但是,每个女孩都有各自的想法,举个例子把,Rabbit只愿意和XHD或PQK做partner,Grass只愿意和linle或LL做partner,PrincessSnow愿意和水域浪子或伪酷儿做partner.考虑到经费问题,boss刘决定只让找到partner的人去坐过山…

奔小康赚大钱 Time Limit:1000MS     Memory Limit:32768KB     64bit IO Format:%I64d & %I64u Submit Status Practice HDU 2255 Description 传说在遥远的地方有一个非常富裕的村落,有一天,村长决定进行制度改革:重新分配房子. 这可是一件大事,关系到人民的住房问题啊.村里共有n间房间,刚好有n家老百姓,考虑到每家都要有房住(如果有老百姓没房子住的话,容易引起不安定因素),每家必须分配到…

Problem Description Today is Ignatius' birthday. He invites a lot of friends. Now it's dinner time. Ignatius wants to know how many tables he needs at least. You have to notice that not all the friends know each other, and all the friends do not want…

从前一个和谐的班级,有 nlnl 个是男生,有 nrnr 个是女生.编号分别为 1,…,nl1,…,nl 和 1,…,nr1,…,nr. 有若干个这样的条件:第 vv 个男生和第 uu 个女生愿意结为配偶. 请问这个班级里最多产生多少对配偶? 输入格式 第一行三个正整数,nl,nr,mnl,nr,m. 接下来 mm 行,每行两个整数 v,uv,u 表示第 vv 个男生和第 uu 个女生愿意结为配偶.保证 1≤v≤nl1≤v≤nl,1≤u≤nr1≤u≤nr,保证同一个条件不会出现两次. 输出格式…

一.什么是二分图 首先它需要是一张无向图. 之后它需要同时满足两个条件:①它的N个点被分为两个集合,且这两个集合交集为空:②同一集合内的点之间没有边相连. 二.无向图是否为二分图的判定 引理:无向图是二分图当且仅当图中不存在为奇环.(证明不会略) 方法:基于染色法.如把当前点染为黑色,尝试把与它相邻的点染成白色.若发现和他相邻的点已被染色还不是白色,证明存在奇环,则不是二分图 实现:可用BFS,也可用DFS,复杂度O(N+M). bool check(int w) { memset(vis,,s…

http://acm.hdu.edu.cn/showproblem.php?pid=2444 The Accomodation of Students Time Limit:1000MS     Memory Limit:32768KB     64bit IO Format:%I64d & %I64u Submit Status Practice HDU 2444 Description There are a group of students. Some of them may know…

The Accomodation of Students Time Limit: 5000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 8418    Accepted Submission(s): 3709 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…

题目来源:HDU 2444 The Accomodation of Students 题意:n个人能否够分成2组 每组的人不能相互认识 就是二分图判定 能够分成2组 每组选一个2个人认识能够去一个双人间 最多能够有几组 思路:二分图判定+最大匹配 #include <cstdio> #include <cstring> #include <vector> using namespace std; const int maxn = 550; int vis[maxn];…

传送门:http://acm.hdu.edu.cn/showproblem.php?pid=2444 题意:首先判断所有的人可不可以分成互不认识的两部分.如果可以分成 ,则求两部分最多相互认识的对数. 思路:二分图最大匹配问题.先BFS判断是否为二分图,再用匈牙利算法算最大匹配量 关于匈牙利算法:https://blog.csdn.net/CillyB/article/details/55511666 代码: #include<iostream> #include<cstdio>…

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 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…

The Accomodation of Students Time Limit: 5000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 9477    Accepted Submission(s): 4165 题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=2444 Description: There are a gro…

hdu_2444The Accomodation of Students(二分图的判定和计算) 标签:二分图匹配 题目链接 题意: 问学生是否能分成两部分,每一部分的人都不相认识,如果能分成的话,两两认识的人可以去开房哈.求最大的开房数. 题解: 二分染色,黑白染色来看这个图可以被染成一个二分图,如果可以的话求出二分图匹配的个数即可 注意事项: dfs来染色,在求解的时候注意点的编号是从0还是从1开始的 代码: //二分图最好用链表存图 #include<cstdio> #include<…

The Accomodation of Students Time Limit: 5000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 2244 Accepted Submission(s): 1056 Problem Description There are a group of students. Some of them may know each other,…

题目链接: hdu:http://acm.hdu.edu.cn/showproblem.php?pid=5285 bc:http://bestcoder.hdu.edu.cn/contests/contest_chineseproblem.php?cid=609&pid=1002 wyh2000 and pupil Time Limit: 3000/1500 MS (Java/Others)    Memory Limit: 131072/65536 K (Java/Others)Total S…

The Accomodation of Students Time Limit: 5000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3565    Accepted Submission(s): 1659 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)Total Submission(s): 4091    Accepted Submission(s): 1876 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) Total Submission(s): 7086    Accepted Submission(s): 3167 Problem Description There are a group of students. Some of them may know each o…

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…

链接: https://vjudge.net/problem/HDU-2444#author=634579757 题意: 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 that A and C know…