有n个任务,每个任务有一个截止时间,超过截止时间一天,要扣一个分.求如何安排任务,使得扣的分数最少.Input有多组测试数据.第一行一个整数表示测试数据的组数第一行一个整数n(1<=n<=15)接下来n行,每行一个字符串(长度不超过100)表示任务的名称和两个整数,分别表示任务的截止时间和完成任务需要的天数. 这n个任务是按照字符串的字典序从小到大给出.Output每组测试数据,输出最少扣的分数的. 并输出一个完成任务的方案,如果有多个方案,输出字典序最小的一个.Sample Input 2…

Ignatius has just come back school from the 30th ACM/ICPC. Now he has a lot of homework to do. Every teacher gives him a deadline of handing in the homework. If Ignatius hands in the homework after the deadline, the teacher will reduce his score of t…

Ignatius has just come back school from the 30th ACM/ICPC. Now he has a lot of homework to do. Every teacher gives him a deadline of handing in the homework. If Ignatius hands in the homework after the deadline, the teacher will reduce his score of t…

题目链接:https://cn.vjudge.net/contest/68966#problem/D 具体思路:我们可以把每个情况都枚举出来,然后用递归的形式求出最终的情况. 比如说 我们要求  10101 的扣分最小值,我们可以把 10100和00101和10001这三种 情况加上 对应的课的时候的最小值,具体解释看代码 (再理解一下,对于这个公式tmp[i]=tmp[i^(1<<j)]+max(sum-d[j],0) 我们之前求的是总的花费的时间,然后如果一门课的截止时间小于这个总的时间花…

#include<iostream> #include<cstring> #include<cstdio> #include<string> #include<cmath> using namespace std; const int INF=0x3f3f3f3f; <<)+; ; ],cost[]; int dp[MAXN],t[MAXN]; ][]; int pre[MAXN]; void print(int x) { ) ret…

原题直通车:HDU  1074  Doing Homework 题意:有n门功课需要完成,每一门功课都有时间期限t.完成需要的时间d,如果完成的时间走出时间限制,就会被减 (d-t)个学分.问:按怎样的顺序做才能使得学分减得最少. 分析:因为n<=15数据比较小,可以用状态DP做.状态k(若k&(1<<j)==1表示第j门功课已经完成,反之未完成), 状态数最多为(1<<16)-1,每个状态k可由状太r(r<k, r&(1<<j)==0且k&…

HDU 1074 Doing Homework (动态规划,位运算) Description Ignatius has just come back school from the 30th ACM/ICPC. Now he has a lot of homework to do. Every teacher gives him a deadline of handing in the homework. If Ignatius hands in the homework after the d…

E - Tunnel Warfare HDU - 1540 对这个题目的思考:首先我们已经意识到这个是一个线段树,要利用线段树来解决问题,但是怎么解决呢,这个摧毁和重建的操作都很简单,但是这个查询怎么查呢, 这个是不是要判断这一个点左边和右边最远的距离,然后相加起来就可以了,所以就是维护一个区间最左边和最右边的值,然后把他们合并就是最大值. 这个最左边的值 pre_max = 子左节点的 pre_max 如果这个 pre_max==len 那就可以合并子右节点的 pre_max 最右值同理 这个…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1074 题目大意:学生要完成各科作业, 给出各科老师给出交作业的期限和学生完成该科所需时间, 如果逾期一天则扣掉一单位学分, 要你求出完成所有作业而被扣最小的学分, 并将完成作业的顺序输出. Sample Input 2 3 Computer 3 3 English 20 1 Math 3 2 3 Computer 3 3 English 6 3 Math 6 3   Sample Output 2…

http://acm.hdu.edu.cn/showproblem.php?pid=1074 Doing Homework Problem Description Ignatius has just come back school from the 30th ACM/ICPC. Now he has a lot of homework to do. Every teacher gives him a deadline of handing in the homework. If Ignatiu…