using System;

public class Program

{

    public static void Main()

    {

        int colorTextbox = 0;

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

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

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

            Console.WriteLine("Price = 20 Baht");

        }

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

            Console.WriteLine("Price = 30 Baht");

        }

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

            Console.WriteLine("Price = 50 Baht");

        }

        else{

            Console.WriteLine("Out of service");

        }

    }

}