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) throws IOException{
		String str[];
        double r;
        double area,circumference;
        String a,c;


        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        str = br.readLine().split(" ");
        r = Double.parseDouble(str[0]);

        area = r * r * Math.PI;
        circumference = (r + r) * Math.PI;
        a = String.format("%.6f", area);
        c = String.format("%.6f", circumference);
        System.out.println(a + " " + c);
	}
}