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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lcy

背包问题.....一定要多练习...

代码：----

 #include<stdio.h>
 #include<string.h>
 #define maxn 1005
 int dp[maxn],arr[maxn][];
 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,,sizeof dp);
         for(i=;i<n;i++)
         {
             scanf("%d",arr[i]+);
         }
         for(i=;i<n;i++)
         {
             scanf("%d",arr[i]+);
         }
        for(i=;i<n;i++)
            zeroonepack(arr[i][],arr[i][],v);
        printf("%d\n",dp[v]);
     }
     return ;
 }

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+));
     sta *stu =(sta *)malloc(sizeof(sta)*(n+));
        for(i=;i<n;i++)
            scanf("%d",&stu[i].a);
        for(i=;i<n;i++)
            scanf("%d",&stu[i].b);
        for(i=;i<=v;i++)
            dp[i]=;

       for(i=;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\n",dp[v]);
       free(dp);
       free(stu);
    }
    return ;
}