题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=2602 这是做的第一道01背包的题目.题目的大意是有n个物品,体积为v的背包.不断的放入物品,当然物品有各自的体积和价值.在不超过总体积v的情况下,问能够达到的最大价值.并且物品是一个一个放入的.最后若有剩余的体积也不会填满. 刚开始是用贪心做的.将价值与体积的比值设定为一个值,即单位价值.然后按照单位价值排序,挨个取物品,考虑到了体积为0的情况,就将单位价值设定为无穷大.但是这样做并不能保证最优解.…

Bone Collector Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 60469    Accepted Submission(s): 25209 Problem Description Many years ago , in Teddy’s hometown there was a man who was called “Bo…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=2602 Many years ago , in Teddy’s hometown there was a man who was called “Bone Collector”. This man like to collect varies of bones , such as dog’s , cow’s , also he went to the grave …  The bone collect…

这种01背包的裸题,本来是不想写解题报告的.但是鉴于还没写过背包的解题报告.于是来一发. 这个真的是裸的01背包. 代码: #include <iostream> #include <cstdio> using namespace std; #define N 1007 int c[N],w[N],dp[N]; int main() { int t,i,n,V,v; scanf("%d",&t); while(t--) { scanf("%d%…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=2602 水题啊水题 还给我WA了好多次 因为我在j<w[i]的时候状态没有下传.. #include <cstdio> #include <algorithm> #include <cstring> using namespace std; typedef long long LL; typedef pair<int,int> PII; #define PB…

题意:给定一个体积,和一些物品的价值和体积,问你最大的价值. 析:最基础的01背包,dp[i] 表示体积 i 时最大价值. 代码如下: #pragma comment(linker, "/STACK:1024000000,1024000000") #include <cstdio> #include <string> #include <cstdlib> #include <cmath> #include <iostream>…

Bone Collector Time Limit : 2000/1000ms (Java/Other)   Memory Limit : 32768/32768K (Java/Other) Total Submission(s) : 21   Accepted Submission(s) : 6 Problem Description Many years ago , in Teddy’s hometown there was a man who was called “Bone Collec…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=2602 思路分析:该问题为经典的0-1背包问题:假设状态dp[i][v]表示前i件物品恰放入一个容量为v的背包可以获得的最大价值,则可以推导出dp递推公式 dp[i][v] = Max{dp[i-1][v], dp[i-1][v – c[i]] + w[i]}:c[i]表示第i件物品的容量,w[i]表示第i件物品的价值:该动态规划问题每个阶段的决策为是否要 选择第i件物品放入背包中,如果不选择第i件物…

Many years ago , in Teddy’s hometown there was a man who was called “Bone Collector”. This man like to collect varies of bones , such as dog’s , cow’s , also he went to the grave …The bone collector had a big bag with a volume of V ,and along his tri…

本文出自:http://blog.csdn.net/svitter 题意:典型到不能再典型的01背包.给了我一遍AC的快感. //============================================================================ // Name : 2602.cpp // Author : vit // Version : // Copyright : Your copyright notice // Description : Hello…