Data Structures
•Linear Linked list...
• private:
• node * head;
• node * tail;  //???helpful? no!
•So, Where is the “top”?
–if the top is at the “tail”, what would the implication of push and pop be? Push would be fine if a tail pointer were provided...but Pop would be disastrous, requiring traversal!!
–if the top is at the “head”, push and pop are essentially “direct access”, no traversals needed!
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