private static void loadFinished(HashSet<Long> finished) throws Exception {
		ArrayList<File> finishedList = new ArrayList<File>(Arrays.asList(new File("./Finished/").listFiles()));
		int cnt = 0;
		for (File file : finishedList) {
			BufferedReader buff = new BufferedReader(new FileReader(file));
			String id;
			int i = 0;

			while ((id = buff.readLine()) != null) {
				finished.add(new Long(id));
				cnt++;
				i++;
			}
			System.out.println(file.getName() + " " + i);
			buff.close();
		}

		System.out.println("\n" + cnt + " finished user loaded.");
		System.out.println(finished.size() + " Unique users");
	}