Generate Every Ordered Sum Using Ones and Twos
Company: Google
Role: Software Engineer
Category: Coding & Algorithms
Difficulty: medium
Interview Round: Onsite
Overview: Generate every ordered string of ones and twos whose digit values sum to a target integer, with no duplicates and lexicographic output. The problem tests complete enumeration, deterministic ordering, small-target edge cases, and reasoning about an inherently exponential result set.
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