Binary Search
Coming soonGo beyond textbook binary search into search-on-answer, rotated arrays, and boundary-finding templates that never off-by-one.
14
Planned lessons
12
Coding problems
7h
Est. study time
Medium
Difficulty
Overview
Binary search is more than finding a value in a sorted array. This course covers boundary-finding templates, search-on-answer, and rotated-array variants that never produce an off-by-one.
Why it matters
Binary search turns O(n) scans into O(log n) and, via search-on-answer, cracks optimisation problems that look nothing like search. A reliable template removes the boundary bugs that sink candidates.
What the course will cover
- The canonical lower-bound / upper-bound template
- Search on the answer (minimise the maximum, etc.)
- Rotated and mountain arrays
- Binary search on floating-point answers
- Patterns: Koko Eating Bananas, Search in Rotated Sorted Array
Interview relevance
When an input is sorted or a problem asks for the minimum feasible value, interviewers expect binary search. Getting the boundaries right on the whiteboard is a strong signal.
Topics you'll master
In the meantime, dive into a published track to keep your momentum.