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还是DP吧

Posted by MarHong at 2010-06-07 14:38:43 on Problem 1014
In Reply To:取模的方法是错的,不信自己去UVA试试。贴上代码,留给路人! Posted by:stupidjohn at 2010-06-06 21:42:06
> #include<iostream>
> using namespace std;
> int m1[60001],m2[120001];
> int array[7];
> int calc(int *s,int m,int n)
> {
> 	int i,j,k,sum=0,rest;
> 	for(i=1;i<60001;i++) s[i]=0;
> 	s[0]=1;
> 	for(i=m;i<=n;i++)
> 	{
> 		sum+=array[i]*i;
> 		for(j=1;j<array[i];j*=2)
> 		{
> 			for(k=sum;k>=j*i;k--)
> 			if(s[k]==0&&s[k-j*i])
> 				s[k]=1;
> 		}
> 		j=array[i]-j/2;
> 		for(k=sum;k>=j*i;k--)
> 		if(s[k]==0&&s[k-j*i])
> 			s[k]=1;
> 	}
> /*	for(i=0;i<=sum;i++)
> 	cout<<" "<<i<<":"<<s[i];
> 	cout<<endl;*/
> }
> int main()
> {
> 	int i,times=1,a,flag;
> 	while(cin>>array[1])
> 	{
> 		flag=0;
> 		array[0]=0;
> 		for(i=2;i<7;i++)
> 		{
> 			cin>>array[i];
> 			array[0]+=array[i]*i;
> 		}
> 		array[0]+=array[1];
> 		if(array[0]==0) break;
> 		if(array[0]&0x1) {cout<<"Collection #"<<times++<<":"<<endl;cout<<"Can't be divided.\n"<<endl;continue;}
> 		array[0]/=2;
> 		calc(m1,1,3);
> 		calc(m2,4,6);
> 		for(i=0;i<=array[0];i++)
> 		if(m1[i]&&m2[array[0]-i])
> 		{
> 			flag=1;break;
> 		}
> 		cout<<"Collection #"<<times++<<":"<<endl;
> 		if(flag) cout<<"Can be divided."<<endl;
> 		else cout<<"Can't be divided."<<endl;
> 		cout<<endl;
> 	}
> }
> 
> 

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