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 C# (judge verdict: Wrong Answer)

class Program
    {
        static void Main(string[] args)
        {
            string[] inputs = System.Console.ReadLine().Split(' ');
            float r = float.Parse(inputs[0]);
            System.Console.WriteLine(r*r* 3.141592f + " "+(r+r)* 3.141592f);
        }
    }