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Maximum Subarray (Kadane's algorithm).

Maximum subarray is the entry-point 1D DP problem, and Kadane's is the O(n) one-liner. What interviewers watch for: the 'extend or restart' call at each element and the all-negative edge case most people fumble. Here is the answer.

Updated Sep 2026 · Grounded in real GenAI, LLM, and AI/ML engineering interview loops and written to a senior-engineer editorial bar.

Maximum subarray is the entry-point 1D DP problem, and Kadane's is the O(n) one-liner. What interviewers watch for: the 'extend or restart' call at each element and the all-negative edge case most people fumble. Here is the answer.

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