export declare const MODEL_ANSWERS_DIRNAME = "model_answers";
export declare const FAILING_MODEL_ANSWERS_DIRNAME = "model_answers.fails";
/**
 * Find model answer directories under `<problemDir>/model_answers/`.
 * Returns absolute paths sorted lexicographically.
 */
export declare function findModelAnswerDirs(problemDir: string): Promise<string[]>;
/**
 * Find failing model answer directories under `<problemDir>/model_answers.fails/`.
 * Returns absolute paths sorted lexicographically.
 */
export declare function findFailingModelAnswerDirs(problemDir: string): Promise<string[]>;