using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("How many subjects will you take?");

        var s = Console.ReadLine();

        var ns = int.Parse(s);

        if (ns <=6)

        {

            var t = ns * 50;

            Console.WriteLine("Total: $" + t);

        }

        else 

        {

            Console.WriteLine("Total: $350");

        }

    }

}