Count Completed Jobs in a Serial Single-Worker Pipeline

Company: Plaid

Role: Software Engineer

Category: Coding & Algorithms

Difficulty: medium

Interview Round: Technical Screen

Overview: Calculate how many jobs finish before a deadline in a serial, stage-gated, single-worker pipeline. The prompt tests cumulative-time reasoning, partial-stage completion, zero-job stages, very large counts and durations, overflow safety, and linear processing without mutating input.

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