internal class Program
{
    private static void Main(string[] args)
    {
        double radius = 0;
        double height = 0;

       
        bool validRadius = false; // Input validation for radius
        while (!validRadius)
        {
            Console.WriteLine("Enter the radius of the cone:");
            string radiusInput = Console.ReadLine();
            if (double.TryParse(radiusInput, out radius) && radius > 0)
            {
                validRadius = true;
            }
            else
            {
                Console.WriteLine("Invalid input. Please enter a positive number for the radius."); //Valid input value for radius
            }
        }

        // Input validation for height
        bool validHeight = false;
        while (!validHeight)
        {
            Console.WriteLine("Enter the height of the cone:");
            string heightInput = Console.ReadLine();
            if (double.TryParse(heightInput, out height) && height > 0)
            {
                validHeight = true;
            }
            else
            {
                Console.WriteLine("Invalid input. Please enter a positive number for the height."); //Validation for valid input for height
            }
        }

        double volume = (3.142 * (radius * radius) * height) / 3;
        volume = Math.Round(volume, 2); // Volume value to be rounded to 2 decimal places

        Console.WriteLine($"The volume of the cone is: {volume}"); //Volume Output
    }
}