Make the search state match the rules
Repair a maze model and traversal, then reason about one-way entry, reusable keys, and path reconstruction.
What you will practice
- Trace a small failing grid before editing.
- Distinguish a coordinate from a full search state.
- Validate an actual route against every move rule.
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Sources and scope
The cited employer material supports the preparation format and skills, not these exact tasks, APIs, tests, or timings. Existing nrml exercises retain their own provenance. Reading times and rehearsal budgets are nrml suggestions. Completion records practice and review, not hiring readiness.
- Meta hiring FAQ · practical-format context, not attribution of this exerciseReviewed 2026-10-28