Scanner sc = new Scanner(System.in);

    List<String> list = new ArrayList<>();

    int nivel = 0;

    while (sc.hasNext()) {
        list.addAll(Arrays.asList(sc.nextLine().split(" ")));
        int x = list.size();
        int[] vet = new int[x];

        for (int i = 0; i < x; i++) {
            vet[i] = Integer.parseInt(list.get(i));
        }

        for (int i = 0; i < x; i++) {
            if (vet[i] >= 10 && vet[i] < 20) {
                nivel = 2;
            }

            if (vet[i] > 20 || vet[i] == 20) {
                nivel = 3;
                break;
            }
        }

        if (nivel == 0) {
            nivel = 1;
        }

        System.out.println(nivel);
    }
}

}