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#include <iostream.h>

template< class Type >
class QueueItem
{
    protected:

    QueueItem< Type> * next;
    QueueItem< Type> * prev;
    Type data;

    public:

    QueueItem();
    QueueItem(Type data1);

    QueueItem< Type> * Add(QueueItem< Type> * item1);
    QueueItem< Type> * OrdAdd(QueueItem< int> * item1);
    QueueItem< Type> * Insert(QueueItem< Type> * item1);
    QueueItem< Type> * OrderlyInsert(QueueItem< Type> * item1);

    QueueItem< Type> * First()
    {
        if (prev)
            return prev->First();
        else
            return this;
    }

    QueueItem< Type> * Delete()
    {
        if (next)
        {
            if (next->next)
            {
                next->Delete();
            }
            delete next;
        }
    }

    void Print()
    {
        cout << data << ' ';
        if (next)
            next->Print();
    }
};