题目链接:http://acm.fzu.edu.cn/problem.php?pid=2214 题目大意:给你T组数据,每组有n个物品,一个背包容量B,每件有体积和价值.问你这个背包容纳的物品最大价值是多少.每个物品只能放入一次背包.  解题思路:首先这个很清楚看出来是个01背包.但是这个背包容量特别大,同时物品的体积很大,总的价值却很少.寻常意义上d[i]表示背包容量为i时的最大价值,那么我们把这个d[]数组的含义改变一下,d[i]表示装价值为i时所需的最小容量. AC代码: #include…

转化思维,把价值当成背包容量,选择最小的花费,从上到下枚举,找到当这个最小的花费. #include<iostream> #include<cstring> #include<cstdio> using namespace std; int main() { ],t,b,w[],v[],n; scanf("%d",&t); while(t--) { scanf("%d%d",&n,&b); ; ;i <…

题目链接:http://acm.hust.edu.cn/vjudge/contest/127149#problem/J 题目大意: 因为总共就分三个队,因为两个队都要选取最优的策略,不论B队咋放,要使A队赢 . 设A队N人,B队M人. 设A第一次排a人,如果B这次要赢,根据最优就派(a+1)人,所以A下两场必需赢就可以得到(N-a)/2>=(M-a-1);因为B队已经赢了一次所以,可以把剩下的都放在一个队上. 假如B这次选择输,那他就在这次不派人,那么在下两场中A必须在赢一次,那么A只要在一次中…

2214 Knapsack problem Accept: 6    Submit: 9Time Limit: 3000 mSec    Memory Limit : 32768 KB  Problem Description Given a set of n items, each with a weight w[i] and a value v[i], determine a way to choose the items into a knapsack so that the total…

http://acm.fzu.edu.cn/problem.php?pid=2214 Accept: 4    Submit: 6Time Limit: 3000 mSec    Memory Limit : 32768 KB  Problem Description Given a set of n items, each with a weight w[i] and a value v[i], determine a way to choose the items into a knapsa…

题目链接:Knapsack problem 大意:给出T组测试数据,每组给出n个物品和最大容量w.然后依次给出n个物品的价值和体积. 问,最多能盛的物品价值和是多少? 思路:01背包变形,因为w太大,转而以v为下标,求出价值对应的最小体积,然后求出能够满足给出体积的最大价值. 经典题目,思路倒是挺简单的,就是初始化总觉得别扭...T_T大概,因为我要找的是最小值,所以初始化为maxn,就结了? 这个问题好像叫01背包的超大背包... 模拟一下样例吧! 1 5 15 // 初始化为dp[0] =…

Knapsack problem Given a set of n items, each with a weight w[i] and a value v[i], determine a way to choose the items into a knapsack so that the total weight is less than or equal to a given limit B and the total value is as large as possible. Find…

Biggest Number 时间限制:1000 ms  |  内存限制:65535 KB 难度:4 描述 You have a maze with obstacles and non-zero digits in it: You can start from any square, walk in the maze, and finally stop at some square. Each step, you may only walk into one of the four neighb…

Description 题目描述 Given a set of n items, each with a weight w[i] and a value v[i], determine a way to choose the items into a knapsack so that the total weight is less than or equal to a given limit B and the total value is as large as possible. Find…

题目链接:http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemCode=3777 Time Limit: 2 Seconds      Memory Limit: 65536 KB The 11th Zhejiang Provincial Collegiate Programming Contest is coming! As a problem setter, Edward is going to arrange the order…