using System;

public class Program

{

    class circle

    {

        double x;

        double y;

        double r;

        public circle( double x, double y, double r)

        {

            this.x=x;

            this.y=y;

            this.r=r;

        }

        public void setx(double x)

        {

            this.x=x;

        }

        public double getx()

        {

            return x;

        }

        public void sety(double y)

        {

            this.y=y;

        }

        public double gety()

        {

            return y;

        }

        public void setr(double r)

        {

            this.r=r;

        }

        public double getr()

        {

            return r ;

        }

        public double S()

        {

            double S;

            S=this.r *this.r *3.14;

            return S;

        }

            public double circmference()

            {

                double p;

                p=this.r *2 *3.14;

                return p;

            }

        public override string ToString()

        {

            return "the x:"+getx() +"\n"+

                 "the y:"+gety() +"\n"+

                 "the r:"+getr();

        }

    }   

    public static void Main()

    {

        circle C1=new circle(7,9,5);

        circle C2=new circle(11,3,6);

        circle C3=new circle(4.5,7,2);

        Console.WriteLine(C1);

        Console.WriteLine(C2);

        Console.WriteLine(C3);

        Console.WriteLine(C1.S());

        Console.WriteLine(C1.circmference());

    }

}