"""
Takuzu is a binary puzzle game.
The objective is to fill a nxn grid with 0s and 1s according to the following rules:
1. Each row and column must contain an equal number of 0s and 1s.
2. No more than two consecutive similar numbers are allowed.
3. Each pair of rows is different, and each pair of columns is different.
The game is won when the grid is filled according to the rules.
This class provides a method to check if a grid is valid.
"""

def check_is_square(grid: list[list[int]]) -> bool:
    """
    Checks if the grid is square, that is, it has the same number of rows and columns.
    :return: bool, True if the grid is square, False otherwise
    """
    pass

def check_only_0s_and_1s(grid: list[list[int]]) -> bool:
    """
    Checks if the grid contains only 0s and 1s.
    :return: bool, True if the grid contains only 0s and 1s, False otherwise
    """
    pass

def check_number_of_0s_and_1s(seq: list[int]) -> bool:
    """
    Checks if the sequence satisfies the first rule of Takuzu,
    that is, each row and column must contain an equal number of 0s and 1s.
    :return: bool, True if the sequence satisfies the rule, False otherwise
    """
    pass

def check_no_more_than_two_similar_numbers_consecutive(seq: list[int]) -> bool:
    """
    Checks if the sequence satisfies the second rule of Takuzu,
    that is, no more than two consecutive similar numbers are allowed.
    :return: bool, True if the sequence satisfies the rule, False otherwise
    """
    pass

def check_uniqueness(seq1: list[int], seq2: list[int]) -> bool:
    """
    Checks if the third rule of Takuzu is satisfied,
    that is, each pair of rows (resp. columns) is different.
    :param seq1: list[int], the first sequence
    :param seq2: list[int], the second sequence
    :return: bool, True if the sequences are unique, False otherwise
    """
    pass

def grid_checker(grid: list[list[int]]) -> bool:
    """
    Checks if the grid is valid according to the rules of Takuzu.
    The three rules are:
    1. Each row and column must contain an equal number of 0s and 1s.
    2. No more than two similar numbers adjacent to each other are allowed.
    3. Each pair of rows is different, and each pair of columns is different.
    :param grid: list[list[int]], the grid to be checked
    :return: bool, True if the grid is valid, False otherwise
    """
    return True


if __name__ == '__main__':
    grid = [
        [0, 1, 1, 0], 
        [1, 0, 0, 1], 
        [0, 0, 1, 1], 
        [1, 1, 0, 0]]
    print(grid_checker(grid))