using System;

public class progarm

{

    public static void Main()

    {

        int n;

        Console.WriteLine("please enter the number of stations : ");

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

             if (n>=1 && n<=2)

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

             else if (n>=3 && n<=5)

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

             else if (n>=6 && n<=8)

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

             else

              Console.WriteLine("Out of service");

        }

     }