using System;

public class Program

{

    public static void Main()

    {

         int n;

            Console.WriteLine("Nhap n: ");

            string s = Console.ReadLine();

            n = int.Parse(s);

            double result = 0;

            for(int i = 1; i<= n; i++)

            {

                result += (1/i);

            }

            Console.WriteLine("Result: " + result);

    }

}