> #include<iostream>
> #include<algorithm>
> using namespace std;
> 
> int main()
> {
> 	int testcases = 0;
> 	int t = 1;
> //	freopen("2487.txt", "r", stdin);
> 	cin >> testcases;
> 	while(testcases)
> 	{
> 		int sum = 0;
> 		int need = 0;
> 		int peonum = 0;
> 		int sign = 0;
> 		cin >> need >> peonum;
> 		int *data;
> 		data = new int[peonum];
> 		int i = 0;
> 		for(i = 0; i < peonum; i++)
> 		{
> 			cin >> data[i];
> 		}
> 		sort(data, data + peonum);
> 		for(i = peonum - 1; i >= 0; i--)
> 		{
> 			sum += data[i];
> 			if((sum > need) && ((sum - data[i]) >= need))
> 			{
> 				sign = 1;
> 				break;
> 			}
> 		}
> 		cout << "Scenario #" << t++ << ":" << endl;
> 		if(sign == 1)
> 		{
> 			cout << (peonum - 1) - i << endl;
> 		}
> 		else cout << "impossible" <<endl;
> 		testcases--;
> 		cout << endl;
> 	}
> 	return 0;
> }