{"id":"listnode-defined-locally-per-problem","text":"`ListNode` is defined locally in each linked-list problem's `solution.py` rather than imported from a shared module — keeps solutions self-contained but means the class is duplicated across every linked-list problem in the repo.","truth_value":"IN","source":"entries/2026/06/06/reverse-linked-list-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"listnode-defined-locally-per-problem","truth_value":"IN","reason":"premise"}]}}