MyReader in = new MyReader(new FileInputStream("functions.in"));
        PrintWriter out = new PrintWriter(new FileOutputStream("functions.out"));
        int n = in.nextInt();
        used = new boolean[n];
        functions = new ArrayList<>(n);
        ans = new ArrayList<>();
        order = new ArrayList<>();
        String name = in.nextWord();
        for (int i = 0; i < n; i++) {
            //System.out.println(name);
            if (name == null) {
                i--;
                continue;
            }
            order.add(i);
            functions.add(new Function(name));
            //System.out.println(name);
            while ((name = in.nextWord()) != null) {
                try {
                    int prev = Integer.parseInt(name);
                    functions.get(i).dep.add(prev);
                } catch (NumberFormatException e) {
                    break;
                }
            }
        }