#include <iostream>
using namespace std;
int f(double num )
{
	double i,sum=0;
	for( i=2;sum<num;i+=1){
		sum+=1/i;
	}
	
	return (int)i-2;	
}


int main()
{
	double num=1;
	while(num!=0.0){
		cin>>num;
		cout<<f(num)<<" card(s)"<<endl;
	}	
	
	return 0;
}