Backtracking · Backtracking — start Index
LC-78. Subsets
LC-78. Subsets on FaangDeck — Backtracking — start Index pattern lesson. Brute force to insight, template, Python solution, trap, complexity and interview…
What's inside this lesson
- Why this problem — a concrete hook, then the problem itself
- Brute force → Insight — what is redundant, and the one idea that removes it
- Spot it — why the pattern fits, and a cheat sheet to recognise it again
- Blueprint → Fill the blanks → Solution — clean, commented Python
- Trace + trap — a step-by-step walkthrough and the near-correct bug, run to show it fail
- Complexity — time and space, with the numbers behind them
- Interview follow-ups — what to say, what they ask next, and where this leads
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