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)

using System;

class P
{
public static void Main()
{
            //????????????????????????
            double r = Double.Parse(Console.ReadLine());

            //?????¨???
            double pi = 3.1516926;
            //??¢???
            double S = pi * r * r;
            //?????¨
            double L = 2 * pi * r;

            //??¨???
            Console.WriteLine("{0:f5} {1:f5}", S, L);
}
}