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先对a[]排序

Posted by qywyh_scut at 2007-04-20 17:40:17 on Problem 3093
In Reply To:是不是有什么trick? 我怎么就一直wrong? Posted by:bmexue at 2006-12-26 10:25:19
> #include <iostream>
> using namespace std;
> 
> int V,D,d[31],sum[31];
> unsigned int dp[31][1001];
> void work()
> {
>    memset(dp,0,sizeof(dp));
>    for(int i=1;i<=V;i++)
>    {
> 	   for(int j=1;j<=D;j++)
> 	   {
> 		   if( j>= sum[i] )
> 			   dp[i][j] = 1;
> 		   else 
> 		   {
> 			   if( j>= d[i] )
> 			   {
> 				   if( dp[i-1][j-d[i]] >0 )
> 				       dp[i][j] = dp[i-1][j-d[i]] + dp[i-1][j];
> 				   else 
> 			           dp[i][j] = 1 + dp[i-1][j];
>                }
> 			   else
> 				   dp[i][j] = dp[i-1][j];
> 		   }
> 	   }
>    }
> }
> 
> int main()
> {
>     freopen("C:\\ACMData.txt","r",stdin);
> 	int T,i,k=1; scanf("%d",&T);
> 	while(T)
> 	{
> 	    scanf("%d%d",&V,&D);
> 		for(i=1;i<=V;i++) scanf("%d", &d[i]);
>         sum[0] =0;
> 		for(i=1;i<=V;i++) sum[i] = sum[i-1] + d[i];
>         work(); printf("%d %u\n",k++,dp[V][D]);
> 
> 		T--;
> 	}
>     return 0;
> }
>  

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