class A06 {
   public static void main(String args[]) {
     A5 f = new A5();
     int i=10;
     if (args.length>0)
     i=Integer.parseInt(args[0]);
     int j;
     double s=0,sum=0;
     for (j=0;j<=i;j++){
     s=(double)j/f.n(j);
     sum=sum+s;
    }
     System.out.println(i+"e的值="+sum);
  }
}