// This class contains the example from lecture.
// Drag the "dummy" variable out to view p and q.

public class ListTest {
    public static void main(String[] args) {
        ListNode dummy = new ListNode(1);
        ListNode p = new ListNode(2, new ListNode(4));
        ListNode q = new ListNode(3, new ListNode(9));
        p.next.next = q;
        q = q.next;
        p.next.next.next = null;
    }
}