Order Layout

Problem Overview

• Validate a backend configuration string for a barcode scanner and output configurations in the correct order.
• Input: pipe-separated entries of a four-digit index plus a value. Output: ordered list of values, or ["Invalid configuration"] if checks fail.
• Validate '|' separation, sequential and unique indices without gaps, alphanumeric values, and no duplicate indices.
• Real-world: scanner setup in retail/logistics; from Amazon interviews; a coding interview problem and interview question.