using System;

public class Program

{

    public static void Main()

    {

        ///ricardo villalobos

        Start:

        Console.WriteLine("Enter the name of the student: ");

        string name=Console.ReadLine();

        Console.WriteLine("Enter the age: ");

        int age=Convert.ToInt32(Console.ReadLine());

        Console.WriteLine("Enter the year of entry: ");

        int year=Convert.ToInt32(Console.ReadLine());

        Console.WriteLine("Enter the nacionality: 1.National 2.Foreign");

        int nac=Convert.ToInt32(Console.ReadLine());

        Console.WriteLine("Enter the number of subjets: ");

        int s=Convert.ToInt32(Console.ReadLine());

        if(year<=2015 && nac==1)

        {

            int t= s*30;

            Console.WriteLine("\nThe total of {0} subjets is ${1}\n",s,t);

            goto Start;

        }

        else if(year<=2015 && nac==2)

        {

            int t= s*35;

            Console.WriteLine("\nThe total of {0} subjets is ${1}\n",s,t);

            goto Start;

        }

        else if(year>2015 && nac==1)

        {

            int t= s*50;

            Console.WriteLine("\nThe total of {0} subjets is ${1}\n",s,t);

            goto Start;

        }

        else if(year>2015 && nac==2)

        {

            int t= s*55;

            Console.WriteLine("\nThe total of {0} subjets is ${1}\n",s,t);

            goto Start;

        }

            }

}