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Talk through the problem while you code. Signed-in reps become prep memory for the next session.
Counting Bits
Counting Bits is about turning repeated work into a reusable state instead of re-solving subproblems. It's a great warm-up that builds state-and-transition thinking without a ton of moving parts. The trap is picking a state that's too vague; keep it minimal and consistent.
Learn this pattern
Dynamic Programming Patterns
Dynamic programming caches overlapping subproblem results so each is solved only once. Define your state in one sentence, write the transition, nail the base cases, and brute-force transforms into polynomial time.
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.
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Dynamic Programming Patterns gives you a useful next rep while you are still on your phone.