给你n个工件,然后有A,B,C三个工厂,然后它们加工第i个工件所需要的时间分别为a[i],b[i],c[i],然后现在要你利用三间工厂加工所有的零件,要求是任何时间工厂都不能停工,而且一定要三间同时做完. 理论上是很难突破时间限制的,但是发现sum(a[i]),sum(b[i]),sum(c[i])<=120,那么就可以这么搞 dp[n][x][y][z]表示利用前n个工件可以到达三间工厂的时间分别为x,y,z的转态,每加一个工件则转移多三种状态,因为最多不会有超过120*120*120状态,然…

https://www.luogu.com.cn/problem/P1352 题目描述 某大学有N个职员,编号为1~N.他们之间有从属关系,也就是说他们的关系就像一棵以校长为根的树,父结点就是子结点的直接上司.现在有个周年庆宴会,宴会每邀请来一个职员都会增加一定的快乐指数Ri,但是呢,如果某个职员的直接上司来参加舞会了,那么这个职员就无论如何也不肯来参加舞会了.所以,请你编程计算,邀请哪些职员可以使快乐指数最大,求最大的快乐指数. 输入格式 第一行一个整数N.(1<=N<=6000) 接下来N…

Information Disturbing Problem Description   In the battlefield , an effective way to defeat enemies is to break their communication system.The information department told you that there are n enemy soldiers and their network which have n-1 communica…

Free DIY Tour Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 6227    Accepted Submission(s): 2013 Problem Description Weiwei is a software engineer of ShiningSoft. He has just excellently fulfi…

题目网址: http://codeforces.com/problemset/problem/414/B Description Mashmokh's boss, Bimokh, didn't like Mashmokh. So he fired him. Mashmokh decided to go to university and participate in ACM instead of finding a new job. He wants to become a member of…

http://acm.split.hdu.edu.cn/showproblem.php?pid=3853 LOOPS Problem Description   Akemi Homura is a Mahou Shoujo (Puella Magi/Magical Girl). Homura wants to help her friend Madoka save the world. But because of the plot of the Boss Incubator, she is t…

LOOPS Time Limit: 15000/5000 MS (Java/Others)    Memory Limit: 125536/65536 K (Java/Others) Total Submission(s): 2552    Accepted Submission(s): 1041 Problem Description Akemi Homura is a Mahou Shoujo (Puella Magi/Magical Girl).Homura wants to help h…

题意:有n个怪,已知杀死第i个怪耗费的血和杀死怪恢复的血,和杀死boss耗的血,血量不能超过100,若过程中血小于0,则失败,问 是否能杀死boss(boss最后出现). 分析:就是求杀死n个怪后剩余的最大血量 dp[i]表示杀怪情况为i(0未杀,1已杀)时剩余最大血量,注意血量上限为100,过程中血小于0,则失败即可. #include <map> #include <set> #include <list> #include <cmath> #inclu…

多校7 HDU5816 Hearthstone 状压DP+全排列 题意:boss的PH为p,n张A牌,m张B牌.抽取一张牌,能胜利的概率是多少? 如果抽到的是A牌,当剩余牌的数目不少于2张,再从剩余牌里抽两张,否则全部拿完. 每次拿到一张B牌,对boss伤害B[i]的值 思路:dp[i]表示状态为i时的方案数 先处理出所有状态下的方案,再枚举每种状态,如果符合ans+=dp[i]*剩余数的全排列 当前集合里有a张A,b张B,那么还能取的牌数:a*-a-b+ #include <bits/stdc…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=3008 题目大意:人有100血和100魔法,每秒增加 t 魔法(不能超过100).n个技能,每个技能消耗cost[i]魔法值,造成hurt[i]伤害.普通攻击不消耗魔法,每秒1伤害. boss有100血,每秒对人造成q伤害.每秒内,人先攻击,boss后攻击.问最少多少秒杀死boss? Sample Input 4 2 25 10 5 20 10 30 28 76 70 4 2 25 10 5 20 1…