public class Circle {
    public static void main(String[] args) {
        double r = Double.parseDouble(args[0]);
        double circumference = 2.0 * Math.PI * r;
        double area = Math.PI * r * r;
        StdOut.printf("Circumference: %.4f%n", circumference);
        StdOut.printf("Area: %.4f%n", area);
    }
}