using System;

public class Program

{

    public static void Main()

    {

        int i;

        Console.Write("Please enter the number of stations ");

        i=Convert.ToInt32(Console.ReadLine());

          if (i>=1 &&i<=2){

            Console.Write("Price = {0} Baht ",20 );

          }

        else if (i>=3 && i<=5){

            Console.Write("Price = {0}  Baht",30  );

        }

         else if (i>=6 && i<=8){

            Console.Write("Price = {0}  Baht",50  );

         }

        else{

            Console.Write("Out of service");

        }

    }

}