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Given a list of problems each annotated with a quality metric (score, flag, or tag) and a definition of "low-quality" (e.g., below a threshold or matching certain tags), identify and return the problems (or their indices/count) that meet that criterion. This is an easy filtering/counting task typically solved with a single linear scan and optional collection of results.
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Leetcode 2026. Low-Quality Problems
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Source snapshot: Nov 12, 2026
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