// Time Complexity: O(n²) (due to substring creation and window reset) } else if (right == s.length() - 1 && !(map.containsKey(s.substring(left, right + 1)))) { map ...

Table users { id uuid [primary key] email string password_hash string role_id integer created_at timestamp } Table roles { id integer [primary key] name string code string created_at timestamp } Table ...