import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		float f = in.nextFloat();
		while(f!=0.00){
			int count = 0;
			float sum =0f;
			for (int i = 2;;i++) {
				sum+=(1.0f/i);
				if(sum>=f){
					break;
				}else {
					count++;
				}
			}
			System.out.println(count+1+" card(s)");
			f = in.nextFloat();
		}
	}
}