public class Circle {
    private double radius;

    public Circle() {

    }

    public Circle(double radius) {
        this.radius = 1;
    }

    public double getRadius() {
        return radius;
    }

    public void setRadius(double radius) {
        this.radius = radius;
    }

    public double findArea(double radius) {
        return Math.PI * radius * radius;
    }
}

class Cylinder extends Circle {
    private double length;

    public Cylinder() {

    }

    public Cylinder(double length) {
        super(1);
        this.length = 1;
    }

    public double getLength() {
        return length;
    }

    public void setLength(double length) {
        this.length = length;
    }

    public double findVolume(double radius, double length) {
        return super.findArea(radius) * length;
    }

    public double findArea(double radius) {
        return super.findArea(radius) * 2 + Math.PI * 2 * radius * length;
    }
}

class CircleTest {
    public static void main(String[] args) {
        Cylinder cyc = new Cylinder(1);
        System.out.println(cyc.findArea(cyc.getRadius()));
    }
}