{"id":"tree2str-handles-negative-vals","text":"Negative node values are serialized correctly (e.g., `-1(-2)(-3)`) with no special-case logic — `str()` handles the sign naturally.","truth_value":"IN","source":"entries/2026/06/06/construct-string-from-binary-tree-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"tree2str-handles-negative-vals","truth_value":"IN","reason":"premise"}]}}