This problem follows the Iterative Reversal pattern, commonly found in the Linked List category. Recognizing this pattern is key to solving it efficiently in an interview setting.
Track prev, curr, next. Point curr.next to prev, advance all three.
You only need three pointers (prev, curr, next) — save the next node before overwriting the pointer, then advance all three.
prev = null
curr = head
while curr:
next = curr.next
curr.next = prev
prev = curr
curr = next
return prevPractice Reverse Linked List and similar Linked List problems with flashcards. Build pattern recognition through active recall.
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