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 Scala (judge verdict: Accepted)

object Main {
  def main (args: Array[String]) {
    val Array(r) = scala.io.StdIn.readLine.split(" ").map(_.toDouble)
    println( f"${scala.math.pow(r,2) * scala.math.Pi}%4f ${r *2 * scala.math.Pi}%4f" )
  }
}