{"id":"path-crossing-set-based-visited","text":"Revisit detection uses a set of coordinate tuples for O(1) membership checks — the standard pattern for cycle/revisit detection on grids in this repo.","truth_value":"IN","source":"entries/2026/06/06/path-crossing-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"path-crossing-set-based-visited","truth_value":"IN","reason":"premise"}]}}