public static void main(String[] args) throws Exception {
		File activeUsers = new File("activeUser.txt");
		if (!activeUsers.exists()) {
			System.err.println("File " + activeUsers.getAbsolutePath()
					+ " does not exist!");
			System.exit(0);
		}
		CalcGraphSize graphCalculator = new CalcGraphSize(activeUsers);
		graphCalculator.calc();
	}