Created method get for getting the first node
Mistake in method add was corrected, created method add by index
Created method get_last
changed count nodes to last nodes number
Added varible count equal to 0
Created counting the first element
Created the counting each node
Created the getting first node
Created the removed method with new nodes count
If there are no nodes in a list after removing first item should not be present
If there are no nodes in a list after removing last item should not be present
In removed method: If we removed last node we can get the new last node