class NonExistingItemException extends Exception {
    private static final long serialVersionUID = 1L;

    public NonExistingItemException(String message) {
        super(message);
    }
}

abstract class Archive {
    int id;
    Date dateArchived;

    public Archive(int id) {
        this.id = id;
        this.dateArchived = null;
    }

    public abstract void openItem(Date date, StringBuilder s);
}

class LockedArchive extends Archive {
    Date dateToOpen;

    public LockedArchive(int id, Date dateToOpen) {
        super(id);
        this.dateToOpen = dateToOpen;
    }

    @Override
    public void openItem(Date date, StringBuilder s) {
        if (date.before(dateToOpen))
            s.append(String.format("Item %d cannot be opened before %s\n", id,
                    dateToOpen.toString()));
        else
            s.append(String.format("Item %d opened at %s\n", id,
                    date.toString()));
    }
}

class SpecialArchive extends Archive {
    int maxOpen;
    private int counter;

    public SpecialArchive(int id, int maxOpen) {
        super(id);
        this.maxOpen = maxOpen;
        this.counter = 0;
    }

    @Override
    public void openItem(Date date, StringBuilder s) {
        if (counter >= maxOpen)
            s.append(String.format(
                    "Item %d cannot be opened more than %d times\n", id,
                    maxOpen));
        else {
            s.append(String.format("Item %d opened at %s\n", id,
                    date.toString()));
            counter++;
        }
    }
}

class ArchiveStore {
    private ArrayList<Archive> archives;
    private StringBuilder s;

    public ArchiveStore() {
        archives = new ArrayList<Archive>();
        s = new StringBuilder();
    }

    public void archiveItem(Archive item, Date date) {
        item.dateArchived = date;
        archives.add(item);
        s.append(String.format("Item %d archived at %s\n", item.id,
                date.toString()));
    }

    public void openItem(int id, Date date) throws NonExistingItemException {
        for (int i = 0; i < archives.size(); i++) {
            if (archives.get(i).id == id) {
                archives.get(i).openItem(date, s);
                return;
            }
        }
        throw new NonExistingItemException(String.format(
                "Item with id %d doesn't exist", id));
    }

    public String getLog() {
        return s.toString();
    }
}