using System;

​

public class Program

{

    public static void Main()

    {

        int min_driving_age = 18;

        int max_driving_age = 90;

        int driver_age = 16;

        bool accompanied_by_adult = true;

        if (driver_age < min_driving_age)

        {

            Console.Write("You are too young to drive.");

        }

        else if (driver_age >= min_driving_age && driver_age <= max_driving_age)

        {

            if (driver_age == 16 && accompanied_by_adult)

            {

                Console.Write("You are in the provisional bracket. You are allowed to drive when accompanied by an adult.");

            }

            else

            {

                Console.Write("You are old enough to drive.");

            }

        }

        else

        {

            Console.Write("You are too old to drive.");

        }

    }

}