def calculate_line_sum(matrix):
    min_sum = 10000
    current_line_index = 0
    i = 0
    for line in matrix:
        current_line_index = i if min_sum > sum(line) else current_line_index
        min_sum = sum(line) if min_sum > sum(line) else min_sum
        i += 1
    return current_line_index


def weak_point(matrix):
    return calculate_line_sum(matrix), calculate_line_sum(list(zip(*matrix[::-1])))  # [0, 0]


if __name__ == '__main__':
    # These "asserts" using only for self-checking and not necessary for auto-testing
    assert isinstance(weak_point([[1]]), (list, tuple)), "The result should be a list or a tuple"
    assert list(weak_point([[7, 2, 7, 2, 8],
                            [2, 9, 4, 1, 7],
                            [3, 8, 6, 2, 4],
                            [2, 5, 2, 9, 1],
                            [6, 6, 5, 4, 5]])) == [3, 3], "Example"
    assert list(weak_point([[7, 2, 4, 2, 8],
                            [2, 8, 1, 1, 7],
                            [3, 8, 6, 2, 4],
                            [2, 5, 2, 9, 1],
                            [6, 6, 5, 4, 5]])) == [1, 2], "Two weak point"
    assert list(weak_point([[1, 1, 1],
                            [1, 1, 1],
                            [1, 1, 1]])) == [0, 0], "Top left"