import java.util.*;

public abstract class AbstractEmployee {
    protected String name;
    protected long salary;
    protected Employee parent = null;
    protected boolean leaf = true;

    public abstract long getSalary();
    public abstract String getName();
    public abstract boolean add(Employee e) 
        throws NoSuchElementException;
    public abstract void remove(Employee e) 
        throws NoSuchElementException;
    public abstract Enumeration subordinates();
    public abstract Employee getChild(String s);
    public abstract long getSalaries();  
    public boolean isLeaf() {
        return leaf;
    }
}