Find Maximum Number of Subjects Passed (AS Intern, but it may apply to other interns)

Internshipamazon

Problem Overview

  • Determine the maximum number of subjects a student can pass by allocating q extra answers across subjects.
  • Input: answered[i] (already answered), needed[i] (required to pass), and integer q; Output: an integer count; Constraints: 1≤n≤1e5, values up to 1e9.
  • Context: quiz-style certification exam prep app with limited review attempts.
  • From Amazon interviews; a coding interview problem and common interview question.

Example

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Input Variables
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