import java.util.Scanner;
import java.util.Random;

public class Coconuts
{
  public static void main(String args[])
  {
    Random r = new Random();
    Scanner kb = new Scanner(System.in);
    int n;
    int inCircle = 0;

    System.out.println("How many coconuts:");
    n = kb.nextInt();
    for (int i = 0; i < n; i++)
    {
      double x = r.nextDouble() * 2.0 - 1.0;
      double y = r.nextDouble() * 2.0 - 1.0;
      if(x*x + y*y < 1.0)
        inCircle++;
    }
    double myPi = 4.0 * (double)inCircle / (double)n;
    System.out.println("My pi = " + myPi + " Java\'s pi = " + Math.PI);
  }
}