B. Sport Mafia time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Each evening after the dinner the SIS's students gather together to play the game of Sport Mafia. For the tournament, Alya pu…

[CF587D]Duff in Mafia 题意:给你一张n个点m条边的无向图,边有颜色和边权.你要从中删去一些边,满足: 1.任意两条删掉的边没有公共的顶点.2.任意两条剩余的.颜色相同的边没有公共的顶点.3.删去的边的边权最大值最小. 求这个最小值,并输出方案. $n,m\le 5\times 10^4$ 题解:首先二分答案.我们二分删去边权的最大值mid,则所有>mid的边都要保留,其余的可以保留也可以删去.因为每条边有删或不删两种状态,所以容易转化为2-SAT模型.于是题中条件可以转化成…

A. Drinks Choosing 统计每种酒有多少人偏爱他们. ki 为每种酒的偏爱人数. 输出ans = (n + 1)/2 >  Σki / 2 ? (n + 1)/2 - Σki / 2 + (Σki / 2)  * 2 : (n + 1)/2 * 2 #include<iostream> #include<algorithm> using namespace std; int n,k; +; int a[L]; int main() { cin>>n&…

                                                                                                             A. Drinks Choosing                                                                                                              time limit pe…

目录 Contest Info Solutions A. Drinks Choosing B. Sport Mafia C. Basketball Exercise D1. Submarine in the Rybinsk Sea (easy edition) D2. Submarine in the Rybinsk Sea (hard edition) E. OpenStreetMap Contest Info Practice Link Solved A B C D1 D2 E F 6/7…

A. Drinks Choosing 有 $n$ 个人,每个人各有一种最喜欢的饮料,但是买饮料的时候只能同一种的两个两个买(两个一对) 学校只打算卖 $\left \lceil \frac{n}{2} \right \rceil$ 对 这意味着有些学生喝不到最喜欢的饮料,求最多有多少学生能喝的最喜欢的饮料 人数和饮料种数均小于等于 $1000$ 直接贪心,对于喜欢同一种饮料的学生中,如果人数为奇数,要么单独买一对,然后把另一个给不喜欢这种饮料的人 要么喝自己不喜欢的饮料,设喜欢某种饮料的学生人数…

D - Drinks Choosing Old timers of Summer Informatics School can remember previous camps in which each student was given a drink of his choice on the vechorka (late-evening meal). Or may be the story was more complicated? There are nn students living…

传送门: http://codeforces.com/problemset/problem/348/A A. Mafia time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output One day n friends gathered together to play "Mafia". During each round of…

http://codeforces.com/problemset/problem/348/A A. Mafia time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output One day n friends gathered together to play "Mafia". During each round of the g…

/* * Mafia.cpp * * Created on: 2013-10-12 * Author: wangzhu */ /** * 每个人都想玩若干场,求至少需要玩几场才可以满足大家的需求. * 结果必然在某个人想玩的次数nmax(此人想玩的是最多的)与所有人想玩的次数和sum之间, * 故二分,left = nmax,right = sum, * 只需要需要玩的次数 * (总人数-1) >= 大家想玩的次数和即可 * */ #include<cstdio> #include<…