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: Wrong Answer)

import java.util.Scanner;

public class Main {
	public static void main(String[]args){
		//????????£????????????
		Scanner sc = new Scanner(System.in);

		//??\??????????????? ??????r
		double r =sc.nextDouble();
		//?????¨????????£?¨?
		double P = Math.PI;
		//????????¢??? ??¬??? ?????????????????????¨???
		double AreaCircle = r * r * P;
		//?????¨????????? ??¬??? ?????¨????????? = ??´??????????¨???
		double Arch =(r + r ) * P;
		//???????????¨???
		System.out.println(AreaCircle + " " + Arch);
	}
}