#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
	cin>>setprecision(3);
	float number;
    while(cin>>fixed>>number)
	{
		float sum=0;
		if(number<0.01||number>5.20)
		{
			cout<<"input error"<<endl;
			cin>>fixed>>number;
		}
		if(number==0)
			return 0;
                float i;
		for(i=2;sum<number;i++)
		{
			sum+=(1/i);
		}
		cout<<i-2<<" card(s)"<<endl;
	}
	
}