import java.io.*;

class circle
{

  static double square(double val)
  {
     return val * val;
  }

  static double distance(double x1, double y1, double x2, double y2)
  {
     double dx = x2 - x1;
     double dy = y2 - y1;
     return Math.sqrt(square(dx) + square(dy));
  }

  static double circumference(double radius)
  {
     return 2 * radius * 3.14159;
  }

  static double area(double radius)
  {
     return square(radius) * 3.14159;
  }
}

class co
{

  public static void main(String Args[]) 
  throws IOException 
  {
     double x1,y1,x2,y2,radius,circ;
     if (Args.length < 4)
     {
        System.out.println("You need to specify two points (four numbers)!");
        return;
     }
     x1 = Double.valueOf(Args[0]).doubleValue();
     y1 = Double.valueOf(Args[1]).doubleValue();
     x2 = Double.valueOf(Args[2]).doubleValue();
     y2 = Double.valueOf(Args[3]).doubleValue();

     radius = circle.distance(x1,y1,x2,y2);
     circ = circle.circumference(radius);

     System.out.println("The circumference is: " + circ);
     System.out.println("The area is: " + circle.area(radius));
  }
}