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feat(coding-challenges): heap - kth largest element with a min-heap of size k - #99
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…f size k Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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coding-challenges/heap/kth_largest_element.py(Medium) — the min-heap-of-size-k window (O(n log k) time, O(k) space), with the "why a min-heap for largest" rationale from the pattern README worked out in code. Tests cover k=1, k=n, all-equal, and duplicates-counting, plus 300 randomised cross-checks against a full sort with heavy duplication.Validation:
python coding-challenges/heap/kth_largest_element.pypassed; full suitepython scripts/run_challenges.py→ 54/54. Bug caught while writing it: the widely-copied example claiming the 3rd largest of [3,2,3,1,2,3,5,7,2,7,4,7] is 4 is wrong under duplicates-counted semantics (three 7s occupy the top three places; the answer is 7) — the example was corrected and both k=3 and k=4 literals verified directly.