HDOJ(HDU).2660 Accepted Necklace (DFS) 点我挑战题目 题意分析 给出一些石头,这些石头都有自身的价值和重量.现在要求从这些石头中选K个石头,求出重量不超过W的这些石头的最大价值是多少? 类似于之前讨论到的数字选不选的问题,此处面临的情况是石头选不选,若选进行一个dfs,若不选择进行另外一个dfs.考虑递归边界: 1.当选够了K个的时候,终止递归: 2.当当前重量大于W的时候,终止递归: 3.当所选石头的下标(代码中的pos)超过石头数量的时候,终止递归: 若…

题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=2660 Accepted Necklace Description I have N precious stones, and plan to use K of them to make a necklace for my mother, but she won't accept a necklace which is too heavy. Given the value and the weight…

Safecracker Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 3966    Accepted Submission(s): 2028 Problem Description   === Op tech briefing, 2002/11/02 06:42 CST === "The item is locked in a Kle…

Accepted Necklace Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2474    Accepted Submission(s): 973 Problem Description I have N precious stones, and plan to use K of them to make a necklace f…

Problem Description I have N precious stones, and plan to use K of them to make a necklace for my mother, but she won't accept a necklace which is too heavy. Given the value and the weight of each precious stone, please help me find out the most valu…

http://acm.hdu.edu.cn/showproblem.php?pid=2660 f[v][u]=max(f[v][u],f[v-1][u-w[i]]+v[i]; 注意中间一层必须逆序循环. #include <cstdio> #include <cstring> #include <algorithm> using namespace std; ][]; ],w[]; int main() { //freopen("a.txt",&qu…

速算24点 Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 2562    Accepted Submission(s): 606 Problem Description 速算24点相信绝大多数人都玩过.就是随机给你四张牌,包括A(1),2,3,4,5,6,7,8,9,10,J(11),Q(12),K(13).要求只用'+','-','*…

1789: [Ahoi2008]Necklace Y型项链 Time Limit: 1 Sec  Memory Limit: 64 MBSubmit: 421  Solved: 258[Submit][Status][Discuss] Description 欢乐岛上众多新奇的游乐项目让小可可他们玩的非常开心.现在他们正在玩比赛串项链的游戏,谁串的最快就能得到优厚的奖品.这可不是普通的项链,而是一种Y型项链,项链的最中间有一颗大珍珠作为结合点,从大珍珠上连出来3条由各种宝石串起来的链子.比赛的规…

[BZOJ1789][BZOJ1830][Ahoi2008]Necklace Y型项链 试题描述 欢乐岛上众多新奇的游乐项目让小可可他们玩的非常开心.现在他们正在玩比赛串项链的游戏,谁串的最快就能得到优厚的奖品.这可不是普通的项链,而是一种Y型项链,项链的最中间有一颗大珍珠作为结合点,从大珍珠上连出来3条由各种宝石串起来的链子.比赛的规则是这样的:每次可以从三条链子中某一条的一端取下来一个宝石,或者安上去一个宝石,称为一次操作,经过若干次操作,最终使得三条链子完全相同.想要赢得比赛,那么只能使用…

Accepted Necklace Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 3136 Accepted Submission(s): 1213 Problem Description I have N precious stones, and plan to use K of them to make a necklace for m…