Meet your coaches
Talk through the problem while you code. Signed-in reps become prep memory for the next session.
Middle of the Linked List
Middle of the Linked List rewards a clean two-pointer invariant instead of checking every combination. It's a great warm-up that builds invariant-driven scanning without a ton of moving parts. The trap is moving the wrong pointer and silently skipping the real answer.
Meet your coaches
Talk through the problem while you code. Signed-in reps become prep memory for the next session.
Chat with Fin or Coco right now on mobile.
Start talking through the problem here. Switch to desktop when you're ready to code and run tests.
Start coaching sessionStart a coached rep now. Sign in before or after the session so StrongYes can save what you struggled with to your prep memory.
Email me this coached-rep link
Desktop required
Sorry - mobile cannot run the editor and tests yet. Use the next step below or email yourself a link to continue on desktop.
Stay in the library until you can get back to desktop for the full editor and tests.