Set 38 - Backtracking LC #39
Use Practice Loop if you need a reset.
Problems
| Problem | Difficulty | Pattern | Video |
|---|---|---|---|
| LC 39. Combination Sum | Medium | Backtracking | Video |
| Implement self-attention from scratch (NumPy) |
Deliverables
- Write a 1-line invariant for each problem.
- Note 1 edge case or pitfall per problem.
- Record time-to-first-correct solution.
Notes
- LC 39: backtrack; reuse same index.
Review
- Time spent + where you got stuck?
- Biggest mistake or missed edge case?
- One concrete improvement for next time.
Comments
Share your approach or ask questions
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