object Time{
  def apply(h1: Int) = new Time(h1);
}

class Time(var h:Int) {
  if(h<0) h = 0;
  def hour:Int = h;
  def hour_=(x:Int){
    if(x<0) h=0
    else h=x;
  }
  
  override def toString() = "[" + hour + "]";
}