Binary String Requests

Problem Overview

• Process two request types on a binary string: "count:<index>" (zeros up to and including index) and "flip" (invert all bits).
• Input: binaryString of '0'/'1' and an array of request strings; Output: an array with counts corresponding to each "count" request in order.
• Indexing is 0-based; requests may alternate; only "count" produces output.
• Real-world domain: bitstring operations and data processing where toggles and prefix counts are queried.
• Databricks coding interview problem; a common interview question.