def load_books(file_path):
    return None

def filter_by_genre(books, genre):
    return None

def get_books_by_author(books, author):
    return None

def calculate_average_rating(books):
    return None

def get_longest_book(books):
    return None

def count_books_by_decade(books):
    return None

def get_top_rated_books(books, n):
    return None

def find_books_by_title_keyword(books, keyword):
    return None

def generate_genre_report(books):
    return None

def save_statistics(stats, file_path):
    return None

def main():
    print("\nПрограмма завершена.")

if __name__ == "__main__":
    main()