#include<iostream>
using namespace std;

int main()
{
    float overhang, sum;
    double i;
    while (cin >> overhang, overhang != 0){
           sum = 0;
           i = 0;
           while (sum < overhang){
                  ++i;
                  sum += 1.0/(i+1);
           }
           cout<<i<<" card(s)"<<endl;
    }
    return 0;
}