http://acm.hdu.edu.cn/showproblem.php?pid=2639       Problem Description The title of this problem is familiar,isn't it?yeah,if you had took part in the "Rookie Cup" competition,you must have seem this title.If you haven't seen it before,it does…

题意:求01背包的第k最优值 输入:第一行为T,下面是T组数据,每组数据有n,m,k 代表n件物品,m容量,和题目要求的k,下一行是n个物品的价值,再一行是n个物品的体积 输出:T行答案 /* 类似于归并排序中合并的做法,对于f[i][j]的k个最优值,从f[i-1][j]和f[i-1][j-w[i]]+v[i] 的k个最优值中选出最优的k个放入 */ #include<cstdio> #include<iostream> #include<cstring> #defi…

Bone Collector II Time Limit: 5000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3471    Accepted Submission(s): 1792 Problem Description The title of this problem is familiar,isn't it?yeah,if you had took par…

题目http://acm.hdu.edu.cn/showproblem.php?pid=2639 分析:这是求第K大的01背包问题,很经典.dp[j][k]为背包里面装j容量时候的第K大的价值. 从普通01背包中可以知道最大价值dp[j]是由dp[j]和dp[j-c[i]]+w[i]决定的.那么可以知道 dp[j][k]也是有dp[j][k]和dp[j-c[i]][k]来决定的. 求次优解.第K优解: 对于求次优解.第K优解类的问题,如果相应的最优解问题能写出状态转移方程.用动态规划解决,那么求…

Bone Collector II Time Limit: 5000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3355    Accepted Submission(s): 1726 Problem Description The title of this problem is familiar,isn't it?yeah,if you had took par…

Bone Collector II Time Limit: 5000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 4178    Accepted Submission(s): 2174 Problem Description The title of this problem is familiar,isn't it?yeah,if you had took pa…

题目链接 Problem Description The title of this problem is familiar,isn't it?yeah,if you had took part in the "Rookie Cup" competition,you must have seem this title.If you haven't seen it before,it doesn't matter,I will give you a link: Here is the l…

这题和典型的01背包求最优解不同,是要求第k优解,所以,最直观的想法就是在01背包的基础上再增加一维表示第k大时的价值.具体思路见下面的参考链接,说的很详细 参考连接:http://laiba2004.blog.163.com/blog/static/8835120220138611342496/http://hi.baidu.com/chenyun00/item/1c6c44318acc8bfaa88428c7 #include <iostream> #include <cstdio&…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=2639 题意:求01背包的第k优解 dp(i, j)表示容量为j时的i优解 对于第二维的操作和01背包几乎一样,只是我们只需要关注每一次取的前k大个即可. #include <algorithm> #include <iostream> #include <iomanip> #include <cstring> #include <climits> #…

The title of this problem is familiar,isn't it?yeah,if you had took part in the "Rookie Cup" competition,you must have seem this title.If you haven't seen it before,it doesn't matter,I will give you a link: Here is the link: http://acm.hdu.edu.c…