{"id":"counter-default-zero-drives-correctness","text":"`max_number_of_balloons` relies on `Counter.__missing__` returning 0 for absent keys; no explicit key-existence checks are needed, and missing characters naturally yield 0.","truth_value":"IN","source":"entries/2026/06/06/maximum-number-of-balloons-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"counter-default-zero-drives-correctness","truth_value":"IN","reason":"premise"}]}}