Description A Bank plans to install a machine for cash withdrawal. The machine is able to deliver appropriate @ bills for a requested cash amount. The machine uses exactly N distinct bill denominations, say Dk, k=1,N, and for each denomination Dk the…

题意:略 多重背包 #include <iostream> #include<cstring> #include<cstdio> using namespace std; #define MAXV 15 #define MAXM 100050 int cash,n,value[MAXV],c[MAXV],f[MAXM],user[MAXM]; int main(){ int i,j,max; while(~scanf("%d%d",&cash…

Cash Machine Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 26172   Accepted: 9238 Description A Bank plans to install a machine for cash withdrawal. The machine is able to deliver appropriate @ bills for a requested cash amount. The ma…

题目大意 给定一个容量为M的背包以及n种物品,每种物品有一个体积和数量,要求你用这些物品尽量的装满背包 题解 就是多重背包~~~~用二进制优化了一下,就是把每种物品的数量cnt拆成由几个数组成,1,2,4,~~~cnt-2^K+1,k满足cnt-2^K+1>0的最大整数,体积和价值乘上相应的数就是相应物品的价值和体积,这样用这些物品能够表示1~~cnt所有的情况~~~这就转化成01背包了~~~ 代码: #include <iostream> #include <cstdio>…

Description A Bank plans to install a machine for cash withdrawal. The machine is able to deliver appropriate @ bills for a requested cash amount. The machine uses exactly N distinct bill denominations, say Dk, k=1,N, and for each denomination Dk the…

http://poj.org/problem?id=1276 #include <stdio.h> #include <string.h> ; #define Max(a,b) (a)>(b)?(a):(b) int dp[N],cash; void ZeroOnePack(int cost)//01背包 { for (int i = cash; i >= cost; i--) { dp[i] = Max(dp[i],dp[i-cost]+cost); } } void…

题目链接:https://cn.vjudge.net/problem/POJ-1276 题意 懒得写了自己去看好了,困了赶紧写完这个回宿舍睡觉,明早还要考试. 思路 多重背包的二进制优化. 思路是将n个物品拆分成log(m)个物品,可使得这些物品组合出1~n个原物品,这个用于01背包中. 提交过程 WA 没理解num-=k AC 代码 #include <cstdio> #include <cstring> #include <algorithm> using name…

题目网址:http://poj.org/problem?id=1276 思路: 很明显是多重背包,把总金额看作是背包的容量. 刚开始是想把单个金额当做一个物品,用三层循环来 转换成01背包来做.T了…… 后面学习了 用二进制来处理数据. 简单地介绍一下二进制优化:✧(≖ ◡ ≖✿)  假设数量是8,则可以把它看成是1,2,4,1的组合,即这4个数的组合包括了1-8的所有取值情况.这是为什么呢?将它们转换成二进制再观察一下: 1:1 2:10 4:100 1:1 二进制都只有0,1.所以1,2,4…

Cash Machine Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 30006   Accepted: 10811 Description A Bank plans to install a machine for cash withdrawal. The machine is able to deliver appropriate @ bills for a requested cash amount. The m…

题目:http://poj.org/problem?id=1276 多重背包模板题,没什么好说的,但是必须利用二进制的思想来求,否则会超时,二进制的思想在之前的博客了有介绍,在这里就不多说了. #include <iostream> #include <string.h> #include <stdio.h> #include <algorithm> #include <math.h> using namespace std; ],cnt[],d…