Binary Search on a Rotated Array

The Binary Search on a Rotated Array technique is applied when tackling problems characterized by specific invariants in the problem state or constraints:

• Core Strategy: Binary search adapted to a rotated sorted array by determining which half is still sorted at each step.
• When to use: Look for opportunities where repeated re-computation can be replaced by maintaining monotonic properties, state windows, or relational pointers.
• Interview Signal: Demonstrating this pattern shows mastery of Binary Search foundations, reducing worst-case algorithmic complexity.