LeetCode 744: Find Smallest Letter Greater Than Target Upper-Bound ACERS Guide
Subtitle / Summary This problem is a textbook upper-bound search with one extra twist: wrap-around. Once you can find the first character > target, the rest is just handling the “no answer inside the array” case by returning the first element. Reading time: 10-12 min Tags: binary search, upper bound, characters, wrap-around SEO keywords: Find Smallest Letter Greater Than Target, upper bound, LeetCode 744 Meta description: Use upper-bound binary search and wrap-around handling to solve LeetCode 744, with correctness reasoning, pitfalls, engineering scenarios, and runnable code in six languages. Target Readers Learners who already know lower bound and want to master upper bound Engineers who search the next greater value in a sorted cyclic list Interview candidates practicing boundary-style binary search Background / Motivation At first glance, this looks like a character problem. It is actually a boundary problem: ...