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Maximum subarray (Kadane) vs divide-and-conquer — proof of correctness?

Q: Maximum subarray (Kadane) vs divide-and-conquer — proof of correctness?

**Core concept.** Maximum subarray (Kadane) vs divide-and-conquer is a classic interview signal. Input n steps Optimal O(n log n) Result Verified How it works — use optimal structure, maintain invariants, handle empty/single/duplicate. Brute O(n²) vs optimal O(n) or O(n log n). | | Brute | Optimal | |---|---|---| | Time |

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Core concept. Maximum subarray (Kadane) vs divide-and-conquer is a classic interview signal.

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