CountKarel

import stanford.karel.*;
 
public class CountKarel extends SuperKarel {
	private int noBeeper = 0;
 
	public void putBeeper() {
		super.putBeeper();
		noBeeper--;
	}
 
	public void pickBeeper() {
		super.pickBeeper();
		noBeeper++;
	}
 
	public boolean beepersInBag() {
		return noBeeper != 0;
	}
}