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();
        }
    }
}