题目链接:https://vjudge.net/contest/103424#problem/H 题目大意:与01背包模板题类似,只不过要我们求第K个最大的总价值. 解题分析: 其基本思想是将每个状态都表示成有序队列,将状态转移方程中的max/min转化成有序队列的合并.这里仍然以01背包为例讲解一下.首 先看01背包求最优解的状态转移方程:f[i][v]=max{f[i-1][v],f[i-1][v-c[i]]+w[i]}.如果要求第K优解,那么 状态f[i][v]就应该是一个大小为K的数组f…

Bone Collector II Time Limit: 5000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 4229    Accepted Submission(s): 2205 Problem Description The title of this problem is familiar,isn't it?yeah,if you had took par…

/* 01背包第k优解问题 f[i][j][k] 前i个物品体积为j的第k优解 对于每次的ij状态 记下之前的两种状态 i-1 j-w[i] (选i) i-1 j (不选i) 分别k个 然后归并排序并且去重生成ij状态的前k优解 */ #include<iostream> #include<cstdio> #include<cstring> #define maxn 1010 using namespace std; ],x[maxn],y[maxn],a,b,z; i…

http://acm.hdu.edu.cn/showproblem.php?pid=2639       Problem Description The title of this problem is familiar,isn't it?yeah,if you had took part in the "Rookie Cup" competition,you must have seem this title.If you haven't seen it before,it does…

题目链接:https://vjudge.net/contest/103424#problem/A 题目大意: 第一行输入几组数据,第二行第一个数字代表物体个数,第二个数代表总体积.需要注意的是,第三排输入的是物品的价值,第四排的物品的体积.在不可以拆分物体的前提下,已知背包的总体积,最大能获取的价值是多少. 01背包模板题,没什么好说的.(附两种形式的dp数组解决方案) //一维dp数组实现(滚动数组) #include <iostream> #include <cstdio> #…

Bone Collector II Time Limit: 5000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 4178    Accepted Submission(s): 2174 Problem Description The title of this problem is familiar,isn't it?yeah,if you had took pa…

解题思路:对于01背包的状态转移方程式f[v]=max(f[v],f[v-c[i]+w[i]]);其实01背包记录了每一个装法的背包值,但是在01背包中我们通常求的是最优解, 即为取的是f[v],f[v-c[i]]+w[i]中的最大值,但是现在要求第k大的值,我们就分别用两个数组保留f[v]的前k个值,f[v-c[i]]+w[i]的前k个值,再将这两个数组合并,取第k名. 即f的数组会增加一维. http://blog.csdn.net/lulipeng_cpp/article/details/…

分析 \(dp[i][j][k]\)为枚举到前i个物品,容量为j的第k大解.则每一次状态转移都要对所有解进行排序选取前第k大的解.用两个数组\(vz1[],vz2[]\)分别记录所有的选择情况,并选择其中前k大的更新当前的dp[i][k].因为dp[i]满足递增的特点,所以可以对两个数组顺序比较选择. #include<bits/stdc++.h> using namespace std; const int maxn = 1e3+5; const int INF = 0x3f3f3f3f;…

#include<iostream> #include<cstdio> #include<algorithm> #include<cstring> #include<cmath> using namespace std; ][],val[],vol[], A[],B[]; int main() { int T,n,v,K,k; scanf("%d",&T); while(T--) { scanf("%d%d%…

The title of this problem is familiar,isn't it?yeah,if you had took part in the "Rookie Cup" competition,you must have seem this title.If you haven't seen it before,it doesn't matter,I will give you a link: Here is the link: http://acm.hdu.edu.c…