题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1213 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,…

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 to stay with strang…

How Many Tables Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 17946    Accepted Submission(s): 8822 Problem Description Today is Ignatius' birthday. He invites a lot of friends. Now it's dinn…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1213 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 frie…

题解:1 2,2 3,4 5,是朋友,所以可以坐一起,求最小的桌子数,那就是2个,因为1 2 3坐一桌,4 5坐一桌.简单的并查集应用,但注意题意是从1到n的,所以要减1. 代码: #include <map> #include <set> #include <list> #include <cmath> #include <queue> #include <stack> #include <vector> #includ…

并查集基本知识看:http://blog.csdn.net/dellaserss/article/details/7724401 题意:假设一张桌子可坐无限多人,小明准备邀请一些朋友来,所有有关系的朋友都可以坐同一张桌,没有关系的则要另开一桌,问需要多少张桌子(小明不坐,不考虑小明与其他人的关系)? 思路:常规的并查集.要求出所有人的老大,有几个老大就要几张桌子.那么有关系的都归为同一个老大.用数组实现,再顺便压缩路径. #include <bits/stdc++.h> #define LL…

题目大意:有n个人 m行数据,每行数据给出两个数A B,代表A-B认识,如果A-B B-C认识则A-C认识,认识的人可以做一个桌子,问最少需要多少个桌子. 题目思路:利用并查集对相互认识的人进行集合的划分,划分完毕后进行遍历,如果发现一个点的根节点是本身,证明找到一个集合,统计集合数便是答案了. #include<cstdio> #include<cstdlib> #include<cmath> #include<iostream> #include<…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1213 简单的并查集 代码: #include<iostream> #include<cstdio> #include<cstdlib> #include<cstring> #define maxn 1100 using namespace std; int parent[maxn]; int m,n; int Find(int x) { int s; ;s=pa…

http://acm.hdu.edu.cn/showproblem.php?pid=1213 果然是需要我陪跑T T,禽兽工作人员还不让,哼,但还是陪跑了~ 啊,还有呀,明天校运会终于不用去了~耶耶耶,又可以快乐的玩耍了~ 水一题睡觉~ ------------------------------------------------华丽的分割线------------------------------------------------- 大意: XXX过生日,他要请客.请客的座位安排是认识的…

F - How Many Tables 并查集的模板都能直接套,太简单不注释了,就存个代码 #include<bits/stdc++.h> using namespace std; ; int parent[size]; ]; int t, n, m, x, y, num; //赋初值 void parentkey(int n){ ;i<=n;i++){ parent[i] = i; cnt[i] = ; } } //找根节点 int find(int x){ return x==par…

这道题跟HDU 1213 How Many Tables 并查集很接近,都是赤裸裸的并查集的题. 思路:如果还须要建n-1条路.每并一次就自减1. 參考代码: #include<stdio.h> int fa[1000]; int find(int u) { return fa[u]==u? u:fa[u]=find(fa[u]); } int main() { int i,n,m,u,v,x,y; scanf("%d%d",&n,&m); while (n…

How Many Tables 题目链接: http://acm.hust.edu.cn/vjudge/contest/123393#problem/C 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…

题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=1213 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 fri…

How Many Tables Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 14081    Accepted Submission(s): 6912 Problem Description Today is Ignatius' birthday. He invites a lot of friends. Now it's dinn…

How Many Tables Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 46694    Accepted Submission(s): 23319 题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1213 Description: Today is Ignatius' birthda…

How Many Tables Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 31632 Accepted Submission(s): 15706 Problem Description Today is Ignatius' birthday. He invites a lot of friends. Now it's dinner ti…

J - How Many Tables Time Limit:1000MS     Memory Limit:32768KB     64bit IO Format:%I64d & %I64u 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…

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 to stay…

How Many Tables Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) 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…

定义&&概念: 啥是并查集,就是将所有有相关性的元素放在一个集合里面,整体形成一个树型结构,它支持合并操作,但却不支持删除操作 实现步骤:(1)初始化,将所有节点的父亲节点都设置为自己,例如pre[1]=1(2)合并,将一个元素或者一集合(两者间有联系)合并到另外一个集合(元素)里面,谁是谁的父亲节点不需要过多在意,视题意而定.(3)查找,在合并时需要运用到查找操作,即查找该元素的父节点,尽量使用路径压缩,可以使并查集更加高效,一旦使用了路径压缩,查询时就会将该查询元素到父亲的边改为直接连…

HDU1213How Many Tables 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…

什么也不用说,并查集裸题,直接盲敲即可. #include <iostream> #include <cstring> #include <cstdlib> #include <cstdio> #include <cctype> #include <cmath> #include <algorithm> #include <numeric> using namespace std; ]; int getFath…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1213 简单并查集,统计单独成树的数量. 代码: #include <stdio.h> #include <string.h> #include <math.h> #include <limits.h> #include <algorithm> #include <iostream> #include <ctype.h> #in…

题目链接:hdu1213 赤裸裸的并查集.....水题一个.... #include<stdio.h> #include<string.h> #include<algorithm> #include<queue> #define MAXN 10 using namespace std; int father[1005]; void build(int n) { for(int i = 0 ; i <= n ; i ++) father[i] = i;…

http://acm.hdu.edu.cn/showproblem.php?pid=1213 题意: 这个问题的一个重要规则是,如果我告诉你A知道B,B知道C,这意味着A,B,C知道对方,所以他们可以留在一个桌子. 例如:如果我告诉你A知道B,B知道C,D知道E,所以A,B,C可以留在一个桌子中,D,E必须留在另一个桌子中.所以Ignatius至少需要2个桌子. 思路: 并查集模板题. #include<iostream> using namespace std; ]; int find(in…

题目大意: 有一个人要过生日了,请他的朋友来吃饭,但是他的朋友互相认识的才能坐在一起,朋友的编号从1 ~ n,输入的两个数代表着这两个人互相认识(如果1和2认识,2和3认识,那么1和3也就认识了).问需要多少桌子. 思路: 并查集的基础题目,pre数组存的是父节点的值,root数组代表是否为根节点.最后统计根节点的数量就可以了~~~~~ #include <iostream> #include <cstdio> #include <cstring> #include &…

题目链接 http://acm.hdu.edu.cn/showproblem.php?pid=1213 题意 给出N个人 M对关系 找出共有几对连通块 思路 并查集 AC代码 #include <cstdio> #include <cstring> #include <ctype.h> #include <cstdlib> #include <cmath> #include <climits> #include <ctime&g…

-----------刷点水题练习java------------- 题意:给定N点,M边的无向图,问有多少个连通块. 思路:可以搜索;  可以并查集.这里用并查集练习java的数组使用,ans=N,合并一个连通块ans--: 以及函数的调用: 经验1:C++声明数组是int fa[1024]:而java则是int[] fa=new int[1024]; 经验2:不加static是非静态函数,访问需要new出该类的对象来调用,加上static是静态函数 可直接访问或者通过类名访问. import…

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…

转自:http://blog.csdn.net/shahdza/article/details/7779230 [HDU]1213 How Many Tables 基础并查集★1272 小希的迷宫 基础并查集★1325&&poj1308 Is It A Tree? 基础并查集★1856 More is better 基础并查集★1102 Constructing Roads 基础最小生成树★1232 畅通工程 基础并查集★2120 Ice_cream's world I 基础并查集★212…