Question: Exercise P12.12. Turn the linked list implementation into a singly-linked list: Drop the previous pointer of the nodes and the previous member function ot the

Exercise P12.12. Turn the linked list implementation into a singly-linked list: Drop the previous pointer of the nodes and the previous member function ot the iterator. Reimplement the other member functions so that they have the same effect as before. Hint: In order to remove an element in constant time, iterators should store the predecessor of the current no

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