Schedule Seller Tasks with Tier-Weighted Round Robin
Company: TikTok
Role: Software Engineer
Category: Coding & Algorithms
Difficulty: hard
Interview Round: Onsite
Overview: Schedule arriving seller tasks by per-seller priority and FIFO order while rotating fairly across sellers. The exercise adds tier weights, seller activation and reactivation, empty queues, null processing results, and persistent turn state across interleaved operations.
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