import java.io.*;
import java.lang.*;
class CircleArea{
	public static void main(String[] args){
		int r=0;
       		try{
				BufferedReader br1 = new BufferedReader(new InputStreamReader(System.in));
				System.out.println("Enter Radius of Circle  : ");
				r = Integer.parseInt(br1.readLine());
				double area = Math.PI*r*r;
				System.out.println("Area of Circle : "+area);
				double	perimeter =2*Math.PI*r ;
				System.out.println("Perimeter of Circle : "+perimeter);
			}
			catch(Exception e){
				System.out.println("Error : "+e);
			}        
	}
}