class Objective implements Comparable<Objective> {

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((name == null) ? 0 : name.hashCode());
		result = prime * result + ((sign == null) ? 0 : sign.hashCode());
		return result;
	}

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

}