public static MyIntegerArrayList loadFollowers(long uid, String dir)
			throws Exception {

		BufferedReader buff = new BufferedReader(new FileReader(new File(dir
				+ uid)));
		MyIntegerArrayList res = new MyIntegerArrayList();
		String s;
		while ((s = buff.readLine()) != null) {
			res.add(Integer.parseInt(s));
		}
		buff.close();
		return res;
	}