Poj1003

package easy;


import java.util.Scanner;

/**
*poj1003
* easy
* @author NC
*/
public class Poj1003 {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        while (scan.hasNext()) {
            float f = scan.nextFloat();
            if (f == 0) {
                break;
            }
            int i = 1;
            float sum = 0f;
            while (sum < f) {
                sum = (float) (sum + 1.0 / (i + 1));
                i++;
            }
            System.out.println((i - 1) + " card(s)");
        }


    }
}