public class Chopstick {
  private int ID;
// hint: use a local variable to indicate whether the chopstick is free 
//                        (lying on the table), e.g.  private boolean free;

  Chopstick(int ID) {
    this.ID = ID;

  }

  synchronized void take() {

  }

  synchronized void release() {

  }
    
  public int getID() {
    return(ID);
  }
}