def worry(x):
    """
    :param x [x, y, z, k, g] history record

    Neuron sense, worry will focus on relation between
    x[2] and x[5] where first is a batch size and second the
    percentage of omitted objects according to total objects
    """
    y = x[2] - x[5]
    if y == x[2]:
        return 0
    else:
        return y / 10
