题目http://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=565 分析:题目是一个01背包问题.但是增加了路径输出. 由于路径,所以才有二维递推的形式. dp[i,j]=max{ dp[i-1,j], dp[i-1,j-m[i]]+m[i]} ​在输出集合的时候,如果dp[i,j]==dp[i-1,j],那么表明第i个物品是没有选入的. 采用的逆推…

DescriptionCD You have a long drive by car ahead. You have a tape recorder, but unfortunately your best music is on CDs. You need to have it on tapes so the problem to solve is: you have a tape N minutes long. How to choose tracks from CD to get most…

624 - CD 题意:一段n分钟的路程,磁带里有m首歌,每首歌有一个时间,求最多能听多少分钟的歌,并求出是拿几首歌. 思路:如果是求时常,直接用01背包即可,但设计到打印路径这里就用一个二维数组标记一下即可. const int N=1e3+10; int n,m,a[N],d[N],v[N][N]; int main() { while(~scanf("%d%d",&n,&m)) { memset(v,0,sizeof(v)); memset(d,0,sizeof(…

CD Time Limit:3000MS Memory Limit:0KB 64bit IO Format:%lld & %llu Submit Status Practice UVA 624 Appoint description: Description Download as PDF You have a long drive by car ahead. You have a tape recorder, but unfortunately your best music is on CD…

You have a long drive by car ahead. You have a tape recorder, but unfortunately your best music is on CDs. You need to have it on tapes so the problem to solve is: you have a tape N minutes long. How to choose tracks from CD to get most out of tape s…

题目链接:https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=565 题意很好理解,普通的01背包,dp[i - 1][j]表示在前i - 1件物品中选取若干物品放入容量为j背包所得到的最大的价值,dp[i - 1][j - w[i]] + v[i]表示前i - 1件物品中选取若干物品放入容量为j - w[i]背包所得到的最大的价值加上第i件物…

E. Fire http://codeforces.com/problemset/problem/864/E Polycarp is in really serious trouble — his house is on fire! It's time to save the most valuable items. Polycarp estimated that it would take ti seconds to save i-th item. In addition, for each…

<题目链接> 题目大意: 你要录制时间为N的带子,给你一张CD的不同时长的轨道,求总和不大于N的录制顺序 解题分析: 01背包问题,需要注意的是如何将路径输出. 由于dp时是会不断的将前面所选物品更新的,所以我们输出路径时,应该倒序,将用过的物品减去,才能得到正确的路径. #include <cstdio> #include <iostream> #include <algorithm> #include <cstring> using name…

You have a long drive by car ahead. You have a tape recorder, but unfortunately your best music is on CDs. You need to have it on tapes so the problem to solve is: you have a tape N minutes long. How to choose tracks from CD to get most out of tape s…

// 集训最终開始了.来到水题先 #include <cstdio> #include <cstring> #include <algorithm> #include <iostream> using namespace std; int a[23]; int d[23][100000]; int flag[23]; int W,n; void init(){ cin >> n; for (int i=1;i<=n;i++) cin >…