import java.util.*;
import java.util.zip.*;
import java.util.List;
import java.util.regex.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.*;
import java.util.concurrent.locks.*;
import java.util.function.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.table.*;
import java.io.*;
import java.net.*;
import java.lang.reflect.*;
import java.lang.ref.*;
import java.lang.management.*;
import java.security.*;
import java.security.spec.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.awt.geom.*;
import javax.imageio.*;
import java.math.*;
import java.time.Duration;
import java.lang.invoke.VarHandle;
import java.lang.invoke.MethodHandles;
class main {

static class FasterFlag implements Runnable {
  private volatile boolean up = false;

  /** returns true if flag was down before (i.e. flag was actually raised right now) */
  public boolean raise() {
    if (up) return false;
    synchronized(this) {
      if (up) return false;
      up = true;
      notifyAll();
      return true;
    }
  }

  public void run() { try { raise(); } catch (Exception __e) { throw rethrow(__e); } }
  
  public void waitUntilUp() { try {
    if (up) return;
    synchronized(this) {
      while (!up) wait();
    }
  } catch (Exception __e) { throw rethrow(__e); } }

  public boolean waitUntilUp(double timeout) {
    if (timeout == infinity()) {
      waitUntilUp();
      return isUp();
    } else
      return waitUntilUp(toMS(timeout));
  }
  
  public boolean waitUntilUp(long timeout) { try {
    if (up) return true;
    synchronized(this) {
      if (!up)
        wait(timeout);
    }
    return isUp();
  } catch (Exception __e) { throw rethrow(__e); } }

  final public boolean get(){ return isUp(); }
public boolean isUp() { return up; }

  public String toString() { return isUp() ? "up" : "down"; }
}
static RuntimeException rethrow(Throwable t) {
  
  if (t instanceof Error)
    _handleError((Error) t);
  
  throw t instanceof RuntimeException ? (RuntimeException) t : new RuntimeException(t);
}

static RuntimeException rethrow(String msg, Throwable t) {
  throw new RuntimeException(msg, t);
}


static double infinity() {
  return positiveInfinity();
}


static long toMS(double seconds) {
  return (long) (seconds*1000);
}




static void _handleError(Error e) {
  //call(javax(), '_handleError, e);
}


static double positiveInfinity() {
  return Double.POSITIVE_INFINITY;
}



}