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.io.*;
import java.util.Scanner;
 
public class Main {
    public static double area(double r) {
        return r * r * Math.PI;
    }

    public static double perimeter(double r) {
        return 2 * Math.PI * r;
    }
    public static void main (String[] args) {
        Scanner sc = new Scanner(System.in);
        double r = sc.nextDouble();
        // int b = sc.nextInt();
        System.out.println(area(r) + " " + perimeter(r));
    }
}