#include<iostream.h>
void main()
{
	double a;
    cin>>a; 
    while(a!=0)
	{
		double p = 0;
		for(double i = 1;p < a;i ++)
			p += 1 / (i + 1 );
	    cout<<(i - 1)<<" "<<"card(s)"<<endl;
		cin>>a;
	}
}