Finding the longest run of consecutive integers without sorting separates candidates who reach for O(n log n) from those who see the hash-set trick. The signal is one loop invariant that kills redundant work. Here is the answer.
Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.
Finding the longest run of consecutive integers without sorting separates candidates who reach for O(n log n) from those who see the hash-set trick. The signal is one loop invariant that kills redundant work. Here is the answer.
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