🧠 Before you code — what pattern fits?
Given the head of a singly linked list, reverse the list and return the new head.
[1,2,3,4,5] → [5,4,3,2,1]
🎬 Video explanation · NeetCode
Your solution runs against 3 unit tests, including edge and large-value cases.
Loading...
Test console · 3 unit tests
Submit your code to run it against all 3 unit tests. Results appear here.
JavaScript, TypeScript & Python run sandboxed in your browser; other languages run on the execution server. Your code is saved locally as you type.
Want the full interview treatment — the conversation, the why, and step-by-step visuals? Read the deep dive →