{"id":"canformarray-linear-time","text":"`canFormArray` runs in O(n) time where n = len(arr), visiting each element exactly once via a greedy left-to-right scan with hash-map lookups.","truth_value":"IN","source":"entries/2026/06/06/check-array-formation-through-concatenation-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"canformarray-linear-time","truth_value":"IN","reason":"premise"}]}}