http://acm.hdu.edu.cn/showproblem.php?pid=2844 [题意] 给定n种价值为Ci,个数为Wi的硬币,问在1~V中的这些数中哪些数能由这些硬币组成? [思路] 多重背包,二进制优化,时间复杂度为O(V*log∑ni) [Accepted] #include<iostream> #include<cstdio> #include<cmath> #include<cstring> #include<string>…

Coins  HDU 2844 不能用最基础的多重背包模板:会超时的!!! 之后看了二进制优化了的多重背包. 就是把多重转变成01背包: 具体思路见:http://www.cnblogs.com/tt123/p/3280521.html #include<iostream> #include<algorithm> #include<stdio.h> #include<string.h> using namespace std; ],a1[],a[],b[];…

http://acm.hdu.edu.cn/showproblem.php?pid=2844 题意: 有n个硬币,知道其价值A1.....An.数量C1...Cn.问在1到m价值之间,最多能组成多少种价值. 思路: dp[i]表示i价值能够组成的最大种数. New~ 欢迎“热爱编程”的高考少年——报考杭州电子科技大学计算机学院关于2015年杭电ACM暑期集训队的选拔 Coins Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 327…

hdu 2844 poj 1742 Coins 题目相同,但是时限不同,原本上面的多重背包我初始化为0,f[0] = 1;用位或进行优化,f[i]=1表示可以兑成i,0表示不能. 在poj上运行时间正好为时限3000ms....太慢了,hdu直接TLE(时限1s); 之 后发现其实并不是算法的问题,而是库函数的效率没有关注到.我是使用fill()按量初始化的,但是由于memset()可能是系统底层使用了四个字节拷 贝的函数(远比循环初始化快),效率要高得多..这就是为什么一直TLE的原因,fil…

Lucky Coins 题目连接: http://acm.hdu.edu.cn/showproblem.php?pid=5985 Description Bob has collected a lot of coins in different kinds. He wants to know which kind of coins is lucky. He finds out a lucky kind of coins by the following way. He tosses all th…

题目链接:https://www.nowcoder.com/acm/contest/207/D 题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=5985 时间限制:C/C++ 1秒,其他语言2秒空间限制:C/C++ 262144K,其他语言524288K64bit IO Format: %lld题目描述 Bob has collected a lot of coins in different kinds. He wants to know which…

HDOJ(HDU).2844 Coins (DP 多重背包+二进制优化) 题意分析 先把每种硬币按照二进制拆分好,然后做01背包即可.需要注意的是本题只需要求解可以凑出几种金钱的价格,而不需要输出种数.因此用0表示不可以,1表示可以.最后对dp数组扫描一遍即可. 代码总览 #include <iostream> #include <cstdio> #include <cstring> #include <algorithm> #define nmax 100…

HDOJ(HDU).3466 Dividing coins ( DP 01背包 无后效性的理解) 题意分析 要先排序,在做01背包,否则不满足无后效性,为什么呢? 等我理解了再补上. 代码总览 #include <iostream> #include <cstdio> #include <cstring> #include <algorithm> #define nmax 505 #define nn 505*100 using namespace std;…

作为一个oier,以及大学acm党背包是必不可少的一部分.好久没做背包类动规了.久违地练习下-.- dd__engi的背包九讲:http://love-oriented.com/pack/ 鸣谢http://blog.csdn.net/eagle_or_snail/article/details/50987044,这里有大部分比较有趣的dp练手题. hud 2602 01背包板子题 #include<cstdio> #include<iostream> #include<cs…

Square Coins Time Limit:1000MS     Memory Limit:32768KB     64bit IO Format:%I64d & %I64u Submit Status Practice HDU 1398 Description People in Silverland use square coins. Not only they have square shapes but also their values are square numbers. Co…

Coins HDU - 2844 POJ - 1742 多重背包可行性 当做一般多重背包,二进制优化 #include<cstdio> #include<cstring> int n,m,anss; ],c[],f[]; int main() { int i,j,t; scanf("%d%d",&n,&m); ||m!=) { anss=; memset(f,,sizeof(f)); ;i<=n;i++) scanf("%d&qu…

Problem Description People in Silverland use square coins. Not only they have square shapes but also their values are square numbers. Coins with values of all square numbers up to 289 (=17^2), i.e., 1-credit coins, 4-credit coins, 9-credit coins, ...…

Problem Description Whuacmers use coins.They have coins of value A1,A2,A3...An Silverland dollar. One day Hibix opened purse and found there were some coins. He decided to buy a very nice watch in a nearby shop. He wanted to pay the exact price(witho…

Coins Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 8999    Accepted Submission(s): 3623 Problem Description Whuacmers use coins.They have coins of value A1,A2,A3...An Silverland dollar. One…

Square Coins Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 7883    Accepted Submission(s): 5332 Problem Description People in Silverland use square coins. Not only they have square shapes but…

Square Coins Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Problem Description People in Silverland use square coins. Not only they have square shapes but also their values are square numbers. Coins with values o…

Coins Time Limit: / MS (Java/Others) Memory Limit: / K (Java/Others) Total Submission(s): Accepted Submission(s): Problem Description Whuacmers use coins.They have coins of value A1,A2,A3...An Silverland dollar. One day Hibix opened purse and found t…

题意是给你几个数,再给你这几个数的可以用的个数,然后随机找几个数来累加, 让我算可以累加得到的数的种数! 解题思路:先将背包初始化为-1,再用多重背包计算,最后检索,若bb[i]==i,则说明i这个数是可以得到的!一个循环计算可以达到的数的个数,最后输出就好了! #include<stdio.h> #define max(a,b) a>b?a:b int bb[500000]; int vv; void shun(int cost,int weight) { int i; for(i=c…

Problem Description You are given N baskets of gold coins. The baskets are numbered from 1 to N. In all except one of the baskets, each gold coin weighs w grams. In the one exceptional basket, each gold coin weighs w-d grams. A wizard appears on the…

Coins Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 10632    Accepted Submission(s): 4230 Problem Description Whuacmers use coins.They have coins of value A1,A2,A3...An Silverland dollar. One…

The Game of Coins mark: #include"cstdio" #include"iostream" #include"queue" #include"algorithm" #include"set" #include"queue" #include"cmath" #include"string.h" #include"…

Language: Default Coins Time Limit: 3000MS   Memory Limit: 30000K Total Submissions: 30047   Accepted: 10195 Description People in Silverland use coins.They have coins of value A1,A2,A3...An Silverland dollar.One day Tony opened his money-box and fou…

题目链接:http://poj.org/problem?id=1742 http://acm.hdu.edu.cn/showproblem.php?pid=2844 题目分类:动态规划 代码: #include<stdio.h> #include<string.h> #include<math.h> #include<algorithm> using namespace std; int n,m; ]; struct P { int a,b; }point[…

pid=1398">链接:hdu 1398 题意:有17种货币,面额分别为i*i(1<=i<=17),都为无限张. 给定一个值n(n<=300),求用上述货币能使价值总和为n的方案数 分析:这题能够用母函数的思想,对300以内的值进行预处理就可以 也可用全然背包思想求300以内的方案数 母函数: #include<stdio.h> int main() { int c1[305],c2[305],i,j,k,n; for(i=0;i<=300;i++){…

Whuacmers use coins.They have coins of value A1,A2,A3...An Silverland dollar. One day Hibix opened purse and found there were some coins. He decided to buy a very nice watch in a nearby shop. He wanted to pay the exact price(without change) and he kn…

链接:http://acm.hdu.edu.cn/showproblem.php?pid=2844 思路:多重背包 , dp[i] ,容量为i的背包最多能凑到多少容量,如果dp[i] = i,那么代表这个数能凑出来,ans+1: 实现代码: #include<bits/stdc++.h> using namespace std; ; int lis[M],dp[M],a[M],c[M]; int main() { int n,m,idx; while(cin>>n>>m…

Problem Description Whuacmers use coins.They have coins of value A1,A2,A3...An Silverland dollar. One day Hibix opened purse and found there were some coins. He decided to buy a very nice watch in a nearby shop. He wanted to pay the exact price(witho…

http://acm.split.hdu.edu.cn/showproblem.php?pid=5985 题意:有多种类型的硬币,每种类型的硬币都有一定的数量,现在每次抛硬币,除去朝下的硬币,知道最后只剩下一个硬币或者没有硬币,最后的硬币便是幸运硬币,求每种类型硬币成为幸运硬币的概率. 思路: 硬币的概率都是单独的,所以我们只需要计算一个硬币的概率情况即可. 设die[i][k]表示第i种硬币在第k次全部被抛弃的概率,易得,用alive[i][k]表示第i种硬币在第k次至少有一个存活的概率就是$…

欢迎参加——BestCoder周年纪念赛(高质量题目+多重奖励) Square Coins Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 9728    Accepted Submission(s): 6668 Problem Description People in Silverland use square coins. Not…

Problem Description People in Silverland use square coins. Not only they have square shapes but also their values are square numbers. Coins with values of all square numbers up to 289 (=17^2), i.e., 1-credit coins, 4-credit coins, 9-credit coins, ...…