{"id":"reduce-gcd-no-initializer","text":"The x-of-a-kind solution calls `reduce(gcd, counts)` without an initial value, meaning an empty deck would raise `TypeError` — safe under LeetCode constraints but not defensively coded.","truth_value":"IN","source":"entries/2026/06/06/x-of-a-kind-in-a-deck-of-cards-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"reduce-gcd-no-initializer","truth_value":"IN","reason":"premise"}]}}