class Archive {
    protected int id;
    protected Date dateArchived;

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

    public Date getDateArchived() {
        return dateArchived;
    }
}
 class LockedArchive extends Archive {
    private Date dateToOpen;

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

    public Date getDateToOpen() {
        return dateToOpen;
    }

}
class SpecialArchive extends Archive {
    protected int maxOpen;
    protected int timesOpen;

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

    public int getMaxOpen() {
        return maxOpen;
    }

}
class ArchiveStore {
    private ArrayList<Archive> files;
    private StringBuilder logFile;

    public ArchiveStore() {
        files = new ArrayList<Archive>();
        logFile = new StringBuilder();
    }

    public void archiveItem(Archive item, Date date) {
        files.add(item);
        logFile.append("Item " + item.id + " archived at " + item.dateArchived+"\n");
    }

    public void openItem(int id, Date date) throws NonExistingItemException {
        boolean isOpen = false;
        Archive itemToArchive = null;
        for (Archive item : files) {
            if (item.id == id) {
                isOpen = true;
                item = itemToArchive;
                break;
            }
        }
        if (isOpen == true) {
            if (itemToArchive instanceof LockedArchive) {
                if (itemToArchive.getDateArchived().getTime() > date.getTime()) {
                    logFile.append("Item " + id + " cannot be opened before " + itemToArchive.getDateArchived()+"\n");
                }
                if (itemToArchive instanceof SpecialArchive) {
                    SpecialArchive o = null;
                    o = (SpecialArchive) itemToArchive;
                    if (o.maxOpen > o.timesOpen) {
                        logFile.append("Item " + id + " cannot be opened more than " + o.maxOpen + " times\n");
                    } else {
                        logFile.append("Item " + id + " opened at " + date + "\n");
                    }
                }
            }
        } else {
            throw new NonExistingItemException("Item with id " + id + " doesn't exist");
        }
    }

    public String getLog() {
        return logFile.toString();
    }
}
@SuppressWarnings("serial")
 class NonExistingItemException extends Exception {
    public NonExistingItemException(String s){
        super(s);
    }
}