> #include<iostream.h>
> int main()
> {
> 	int t;
> 	cin>>t;
>     int tt=0;
> 	while(t--)
> 	{
> 		int array[1001],temp=0,people;
> 		long a;
> 		cin>>a>>people;
> 		while(people--)
> 		{
> 			cin>>array[temp++];
> 		}
> 		for(int i=0;i<temp;i++)
> 			for(int j=i;j<temp;j++)
> 			{
> 				if(array[i]<array[j])
> 				{
> 					int ss=array[j];
> 					array[j]=array[i];
> 					array[i]=ss;
> 				}
> 			}
> 
> 		int result=1;
> 		long sum=0;
> 		people=temp;
> 		temp=0;
> 		while(1)
> 		{
> 			if(result>people)
> 			{
> 				cout<<"Scenario #"<<++tt<<":"<<endl<<"impossible"<<endl<<endl;	
> 				break;
> 			}
> 			sum=sum+array[temp++];
> 
> 			if(sum>=a)
> 			{
> 				cout<<"Scenario #"<<++tt<<":"<<endl<<result<<endl<<endl;
> 			    break;
> 			}
> 			result++;
> 		}
> 	 
> 	}
> 	return 0;
> }