Unit 5 Session 1 (Click for link to problem statements)
Understand what the interviewer is asking for by using test cases and questions about the problem.
next
references to maintain the list order.Plan the solution with appropriate visualizations and pseudocode.
General Idea: Insert the middle
node between head
and tail
by adjusting the next
pointers to link all three nodes sequentially.
1) Create the `middle` node with a value of 150, initially linking it directly to `tail`.
2) Adjust the `next` pointer of the `head` node to point to the new `middle` node.
3) This establishes the order: head -> middle -> tail in the linked list.
⚠️ Common Mistakes
next
pointers could disrupt the linked list's structure, either by skipping a node or creating a loop.# Existing code
head = Node(100)
tail = Node(200)
head.next = tail
middle = Node(150, tail)
head.next = middle