#include <iostream>

using namespace std;

double cal(int n)
{
    float sum=0;
    for (int i=2;i<=n+1;i++)
    {
        sum = sum + (1.0/i);
        //cout<<1.0/i<<"**"<<endl;
        
    }
    return sum;
    
}

int main()
{
    double m;
    cin>>m;
    while(m!=0)
    {
        for(int i=0;i<300;i++)
        {
            if(cal(i)>=m)
            {
                cout<<i<<" card(s)"<<endl;
                break;
            }
        }
        
        cin>>m;
    }
    return 0;
}