@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Node other = (Node) obj;
		if (value != other.value)
			return false;
		if (x != other.x)
			return false;
		if (y != other.y)
			return false;
		return true;
	}