public class Army {
	Node first;
	
	static Army create() {
		Army res = new Army();
		res.first = null;
		return res;
	}
	
	static void addMonster(Army army, Monster monster) {
		army.first = Node.add(army.first, monster);
	}
	
	static void delMonster(Army army, Monster monster) {
		army.first = Node.del(army.first, monster);
	}

	static Monster getMonster(Army army, int index) {
		return Node.get(army.first, index);
	}
	
	static void display(Army army) {
		Node.display(army.first);
	}
}