private static void ReadFigures()
        {
            for (var i = 0; i < 2; i++)
            {
                var figureParts = Console.ReadLine().Split(new[] { '(', ')' }, StringSplitOptions.RemoveEmptyEntries);

                switch (figureParts[0])
                {
                case "rectangle":
                    rectangle = Rectangle.Parse(figureParts[1]);
                    break;

                case "circle":
                    circle = Circle.Parse(figureParts[1]);
                    break;
                }
            }
        }