LC 58

Length of Last Word

Easy · LC 1–100

string
Free
Open problem on LeetCode

Candidate solution routes

Primary

Binary-Search Boundary / First True

Free

Invariant: The first True always lies in [lo,hi]; indexes left of lo are proven False, while hi remains a feasible candidate.

candidate confidence: 0.468 · metadata_only

Open candidate pattern

How to use this page

Read the statement and constraints first, then validate recognition signals, invariant, and complexity. Candidate score is not correctness evidence.