HDUOJ--Bone Collector

Bone Collector

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 21463    Accepted Submission(s): 8633

Problem Description

Many years ago , in Teddy’s hometown there was a man who was called “Bone Collector”. This man like to collect varies of bones , such as dog’s , cow’s , also he went to the grave …
The bone collector had a big bag with a volume of V ,and along his trip of collecting there are a lot of bones , obviously , different bone has different value and different volume, now given the each bone’s value along his trip , can you calculate out the maximum of the total value the bone collector can get ?

 

Input

The first line contain a integer T , the number of cases.
Followed by T cases , each case three lines , the first line contain two integer N , V, (N <= 1000 , V <= 1000 )representing the number of bones and the volume of his bag. And the second line contain N integers representing the value of each bone. The third line contain N integers representing the volume of each bone.

 

Output

One integer per line representing the maximum of the total value (this number will be less than 2³¹).

 

Sample Input

1 5 10 1 2 3 4 5 5 4 3 2 1

 

Sample Output

14

 

Author

Teddy

 

Source

 

 http://acm.hdu.edu.cn/showproblem.php?pid=2602

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代码：----

#include<stdio.h>
#include<string.h>
#define maxn 1005
int dp[maxn],arr[maxn][2];
int max(int a,int b)
{
    return a>b?a:b;
}

void zeroonepack(int cost ,int value,int v)
{
     for(int i=v;i>=cost;i--)
         dp[i]=max(dp[i],dp[i-cost]+value);

}
int main()
{
    int t,n,v ,i;
    scanf("%d",&t);
    while(t--)
    {
        scanf("%d%d",&n,&v);
        memset(dp,0,sizeof dp);
        for(i=0;i<n;i++)
        {
            scanf("%d",arr[i]+0);
        }
        for(i=0;i<n;i++)
        {
            scanf("%d",arr[i]+1);
        }
       for(i=0;i<n;i++)
           zeroonepack(arr[i][1],arr[i][0],v);
       printf("%d
",dp[v]);
    }
    return 0;
}

 优化后代码：

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
struct st
{
    int a;
    int b;
};
typedef struct st sta;
int main()
{
    int test,n,v,i,j;
    scanf("%d",&test);
    while(test--)
    {
        scanf("%d%d",&n,&v);
     int *dp =(int *)malloc(sizeof(int)*(v+1));
     sta *stu =(sta *)malloc(sizeof(sta)*(n+1));
        for(i=0;i<n;i++)
            scanf("%d",&stu[i].a);
        for(i=0;i<n;i++)
            scanf("%d",&stu[i].b);
        for(i=0;i<=v;i++)
            dp[i]=0;

       for(i=0;i<n;i++)
       {
           for(j=v ; j>=stu[i].b ; j--)
           {
            if(dp[j]<dp[j-stu[i].b]+stu[i].a)
               dp[j]=dp[j-stu[i].b]+stu[i].a;
           }
       }
       printf("%d
",dp[v]);
       free(dp);
       free(stu);
    }
    return 0;
}