Problem:
Circle

Write a program which calculates the area and circumference of a circle for given radius r.

Input

A real number r is given.

Output

Print the area and circumference of the circle in a line. Put a single space between them. The output should not contain an absolute error greater than 10-5.

Constraints

0 < r < 10000

Sample Input 1

2

Sample Output 1

12.566371 12.566371

Sample Input 2

3

Sample Output 2

28.274334 18.849556

Solution in JAVA (judge verdict: Accepted)

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main{


	public static void main(String[] args){

		BufferedReader reader=new BufferedReader(new InputStreamReader(System.in));

		try{


			double r=Double.parseDouble(reader.readLine());

			double S=Math.PI*r*r;
			double l=Math.PI*2*r;
			System.out.printf("%6f %6f", S, l);

			reader.close();
		}catch(IOException e){
			System.out.println("??¨??????:"+e);

		}

	}

}