级数调和

import java.util.Scanner;
 
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		double n = sc.nextDouble();
		while (n!=0) {
			double sum = 0;
			int i = 2;
			if(n==0)
				break;
			while (sum < n) {
				sum = 1.0 / i + sum;//////最关键的一步就是这一步 太关键了 一定要用1.0
				i++;
			}
			System.out.println(i - 2 + " card(s)");
			n = sc.nextDouble();
		}
	}
}