Explainer Problem Intro
Problem-statement intro card. eyebrow + title + prompt + input/output slots + optional note + accent + CTA. Theme-safe color-mix ring/tint.
Preview
Given the head of a singly linked list, return the reversed list.
input
1 → 2 → 3 → 4output
4 → 3 → 2 → 1Aim for O(1) extra space.
Props
eyebrow, title, prompt, input, output, note, accent, cta.