Text Justification / String Line Packing

Problem Overview

Given a list of strings (e.g., ['a', 'bb', 'cccccc', 'd', 'eeeee', 'f']), an integer maxRows (e.g., 3), an integer screenWidth (e.g., 6), and a separator string, pack all strings across at most maxRows rows such that no row exceeds screenWidth characters (including separators between words on the same line). It…

• 3 candidate-reported follow-ups — the exact probes interviewers asked, with the trigger for each
• The rest of the problem statement — full requirements, constraints, and edge cases
• Approach and trade-offs — what passing candidates did, and the mistakes that sink people