Implement `describe_balanced_nodes(values)` for a binary tree represented as a zero-based heap array. Work through the function contract, boundary cases, correctness argument, and time and space complexity expected in a production-quality solution.
Company: Netflix
Role: Software Engineer
Category: Coding & Algorithms
Difficulty: medium
Interview Round: Onsite
Overview: Implement `describe_balanced_nodes(values)` for a binary tree represented as a zero-based heap array. Work through the function contract, boundary cases, correctness argument, and time and space complexity expected in a production-quality solution.
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