Check input vector items type.

    :param vector: input vector
    :type vector : list
    :return: bool

def vector_check(vector):
    """
    Check input vector items type.

    :param vector: input vector
    :type vector : list
    :return: bool
    """
    for i in vector:
        if isinstance(i, int) is False:
            return False
        if i < 0:
            return False
    return True