ACboy needs your help Time Limit: 1000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 5872    Accepted Submission(s): 3196 Problem Description ACboy has N courses this term, and he plans to spend at most M days…

http://acm.hdu.edu.cn/showproblem.php?pid=1712 问题 有N件物品和一个容量为V的背包.第i件物品的费用是c[i],价值是w[i].这些物品被划分为若干组,每组中的物品互相冲突,最多选一件.求解将哪些物品装入背包可使这些物品的费用总和不超过背包容量,且价值总和最大. 算法 这个问题变成了每组物品有若干种策略:是选择本组的某一件,还是一件都不选.也就是说设f[k][v]表示前k组物品花费费用v能取得的最大权值,则有: f[k][v]=max{f[k-1]…

ACboy needs your help Time Limit: 1000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 4912    Accepted Submission(s): 2651 Problem Description ACboy has N courses this term, and he plans to spend at most M days…

ACboy needs your help HDU - 1712 ans[i][j]表示前i门课共花j时间最大收益.对于第i门课,可以花k(0<=k<=j)时间,那么之前i-1门课共花j-k时间. 错误记录: 21行一个0写成1 #include<cstdio> #include<cstring> #include<algorithm> using namespace std; ][],ans[][]; int n,m,anss; int main() {…

P1757 通天之分组背包 hdu1712 ACboy needs your help hdu1712题意:A[i][j]表示用j天学习第i个课程能够得到A[i][j]的收益,求m天内获得的收益最大值,一天只能上一节课(转). 分组背包套路: ;i<=组数;++i) ;--j) ;k<=第i组元素个数;++k) ………… 保证一组只选<=1个 #include<iostream> #include<cstdio> #include<cstring> #…

I love sneakers! Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 4464    Accepted Submission(s): 1824 Problem Description After months of hard working, Iserlohn finally wins awesome amount of sc…

B - Gold miner Time Limit:2000MS      Memory Limit:32768KB     Description Homelesser likes playing Gold miners in class. He has to pay much attention to the teacher to avoid being noticed. So he always lose the game. After losing many times, he want…

分组背包(至少选一个) 我真的搞不懂为什么,所以现在就只能当作是模板来用吧 如果有大牛看见 希望评论告诉我 &代码: #include <cstdio> #include <bitset> #include <iostream> #include <set> #include <cmath> #include <cstring> #include <algorithm> #include <map> #…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1712 ACboy needs your help Time Limit: 1000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3045    Accepted Submission(s): 1581 Problem Description ACboy has N cou…

http://acm.hdu.edu.cn/showproblem.php?pid=1712 题意: 有个人学习n门课程,a[i][j]表示用j分钟学习第i门课程所能获得的价值,背包容量为一共有m时间,求最大价值. 思路: P06: 分组的背包问题 问题 有N件物品和一个容量为V的背包.第i件物品的费用是c[i],价值是w[i].这些物品被划分为若干组,每组中的物品互相冲突,最多选一件.求解将哪些物品装入背包可使这些物品的费用总和不超过背包容量,且价值总和最大. 算法 这个问题变成了每组物品有若…