题目链接:http://codeforces.com/contest/742/problem/D D. Arpa's weak amphitheater and Mehrdad's valuable Hoses time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Just to remind, girls in Arpa's lan…

D. Arpa's weak amphitheater and Mehrdad's valuable Hoses Problem Description: Mehrdad wants to invite some Hoses to the palace for a dancing party. Each Hos has some weight wi and some beauty bi. Also each Hos may have some friends. Hoses are divided…

题目链接 :http://codeforces.com/contest/742/problem/D 题意:给你n个女人的信息重量w和美丽度b,再给你m个关系,要求邀请的女人总重量不超过w 而且如果邀请了一个女人要么就邀请她一个,要么要邀请她还有她所有的朋友. 很明显是一道并查集+背包的问题,并不难.要注意的是背包的写法,由于选择情况有两种 1)只选一个女人 2)选和这个女人有关系的一群女人 于是背包最外层是关系数,即联通块的个数,次外层是背包大小,内层是联通个数(由于选择的要求在一个联通块中 只…

http://codeforces.com/problemset/problem/742/D 并查集预处理出所有关系. 一开始的时候,我预处理所有关系后,然后选择全部的时候,另起了一个for,然后再判断. 这样是不对的.因为这样使得同一组里面可能选择了两次. 3 0 2 1 2 3 1 1 3 #include <cstdio> #include <cstdlib> #include <cstring> #include <cmath> #include &…

Arpa's weak amphitheater and Mehrdad's valuable Hoses time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Just to remind, girls in Arpa's land are really nice. Mehrdad wants to invite some Hose…

B. Arpa's weak amphitheater and Mehrdad's valuable Hoses time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Just to remind, girls in Arpa's land are really nice. Mehrdad wants to invite some H…

题目链接:http://codeforces.com/contest/742/problem/C C. Arpa's loud Owf and Mehrdad's evil plan time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output As you have noticed, there are lovely girls in Ar…

C. Arpa's loud Owf and Mehrdad's evil plan time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output As you have noticed, there are lovely girls in Arpa’s land. People in Arpa's land are numbered fro…

题目链接:http://codeforces.com/contest/742/problem/B B. Arpa's obvious problem and Mehrdad's terrible solution time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output There are some beautiful girls in…

B. Arpa’s obvious problem and Mehrdad’s terrible solution time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output There are some beautiful girls in Arpa’s land as mentioned before. Once Arpa came u…