public void AddATail(int val)
{
if (this.Head == null)
{
AddATHead(val);
}
else
{
DoubleLinkedListNode tempNode = new DoubleLinkedListNode(val);
DoubleLinkedListNode TailNode = GetTail();
tempNode.Prev = TailNode;
TailNode.Next = tempNode;
}
}
public MyDoubleLinkedList()
{
Head = null;
}
public int GetIndexValue(int index)
{
DoubleLinkedListNode curr = GetIndexNode(index);
return(curr == null ? -1 : curr.Val);
}
public DoubleLinkedListNode(int val)
{
this.Val = val;
this.Prev = this.Next = null;
}