import java.util.Random;

public class Coconuts
{
  public static void main(String args[])
  {
    Random ran = new Random();
    int numInCircle = 0;
    if(args.length != 1)
    {
      System.out.println("Usage: java Coconuts <numCoconuts>:"); 
      System.exit(1);
    }
    int n = Integer.parseInt(args[0]);
  
    for(int i = 0; i < n; i++)
    {
      double x = ran.nextDouble() * 2.0 - 1.0;
      double y = ran.nextDouble() * 2.0 - 1.0;
      if(x*x + x*y < 1.0)
      {
        numInCircle++;
      }
    }
    double myPi = (double)numInCircle / (double)n * 4.0;
    double realPi = Math.PI;
    System.out.println("My PI is " + myPi);
    System.out.println("Real PI is " + realPi);
  }
}