LC 81
Search in Rotated Sorted Array II
Medium · LC 1–100
Candidate solution routes
Primary
FreeBinary Search on a Sorted Domain
Invariant: At loop entry, an existing target lies inside closed interval [lo,hi]; every outside index has been disproved by sorted comparisons.
candidate confidence: 0.740 · metadata_only
How to use this page
Read the statement and constraints first, then validate recognition signals, invariant, and complexity. Candidate score is not correctness evidence.