import java.awt.*;

public class SiteMapper {

  private static int nb = 0;

  public static void main(String args[]) {
    ExplorerThread explorer = new ExplorerThread();
	 explorer.start();
  }

  public static void ref() {
    nb++;
  }
 
  public static void deref() {
	if(--nb == 0) System.exit(0);
  }
}