#include<iostream>
using namespace std;
int main()
{int i=2,j=0,k;
float len=0;
float length[100];
int count=0;
for(j;;j++)
{cin>>length[j];

 if(length[j]==0.00)
	 break;
}

    for(k=0;k<j;k++)
	{
		for(i=2;len<length[k];i++)   
	{
	len+=1.00/i;
	count++;
	}
if(length[k]>=0.01&&length[k]<=5.2)	
cout<<count<<" card(s)"<<endl;

	}
    return 0;
}