задача 65

class Program
    {
        static void Main(string[] args)
        {
            Console.Write("Enter month: ");
            int month = int.Parse(Console.ReadLine());

            if (month == 1 || month == 12)
            {
                Console.WriteLine("3.8");
            }
            else if (month == 2 || month == 3 || month == 4)
            {
                Console.WriteLine("3.5");
            }
            else if (month == 5 || month == 6 || month == 7 || month == 8)
            {
                Console.WriteLine("4.1");
            }
            else if (month == 9 || month == 10 || month == 11)
            {
                Console.WriteLine("4.9");
            }
            else
            {
                Console.WriteLine("Invalid month!");
            }
        }
    }