import java.util.*;

public class Node implements Position {
    public Object element;  // its element
    public Node parent;     // its parent
    public Vector children; // its children

    public Node(Object element, Node parent, Vector children) {
        this.element = element;
        this.parent = parent;
        this.children = children;
    }

    public Object element() {
        return element;
    }
}