class Objective implements Comparable<Objective> {

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Objective other = (Objective) obj;
		if (name == null) {
			if (other.name != null)
				return false;
		} else if (!name.equals(other.name))
			return false;
		return sign == other.sign;
	}

	public  Objective(String name);
	public  Objective(String name, Sign sign);

}