public class Driver {

	public static void main(String[] args) {
		DoubleList dl = new DoubleList();
		
		dl.insertAtHead(new Integer(3));
		dl.insertAtHead(new Integer(2));
		dl.insertAtHead(new Integer(1));
		
		dl.print();
		
		dl.deleteHead();
		
		dl.print();
		
	}
	
	
}