using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Carlos Ivan Lopez Aldava");

        Console.WriteLine("How many do you work?");

        var h = Console.ReadLine();

        var nh = int.Parse(h);

        if (nh<=29)

        {

            var p = nh * 20;

            Console.WriteLine("Your total payment is: " + p);           

        }

        if (nh>=30)

        {

            var p = nh * 20;

            var p2 = p + (nh * 1.5);

            Console.WriteLine("Your total payment is: " + p2);

        }

    }

}