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feat(coding-challenges): dynamic programming - house robber with two rolling states - #98
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…rolling states Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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coding-challenges/dynamic-programming/house_robber.py(Medium) — the take/skip two-state DP collapsed to two rolling variables (O(1) space), including why the O(n) table is unnecessary. Tests cover empty, single, two houses, all-equal, and the[2,1,4,1,1]case where "take the biggest first" gets 6 instead of 7, plus 300 randomised cross-checks against an exhaustive subset search.Validation:
python coding-challenges/dynamic-programming/house_robber.pypassed; full suitepython scripts/run_challenges.py→ 53/53.