#include <iostream>
using namespace std;
int main()
{
	float number=0.00;
	float cards[1000];
	int i=0;
	int j=0;
	while(cin>>cards[i])
	{
		if(cards[i]==0.00)
			break;
		i++;

	}
	int count=i;
	i=0;
	for(i;i<count;i++)
	{
		while(number<cards[i])
		{		
			j++;
			number+=(float)1/(1+j);
		}
		cout<<j<<" "<<"card(s)"<<endl;
		j=0;
		number=0.00;
	}
	
	return 1;
}