Binary Search Speedrun ⚡

Speedrun is a review format — there is no time pressure. Instead of writing full solutions, you answer a multiple choice question about the key technique or template used to solve each problem. The goal is to see many problems quickly and sharpen pattern recognition. For a full explanation of the format, see the Speedrun overview.

Each question presents a binary-search problem and asks you to identify or complete the critical step. It's recommended that you have gone through at least Find the First True in a Sorted Boolean Array, Monotonic Function and Binary Search Template and a number of example problems in the binary search section before starting.