def get_length_of_missing_array(array_of_arrays):
    seq = []
    missing = 0
    if not array_of_arrays:
        return 0

    for i in array_of_arrays:
        if not i:
            return 0
        array = (len(i))
        seq.append(array)
    seq.sort()
    #print (seq)
    counter = seq[0]

    for x in seq:
        if x == counter:
            counter = counter + 1
        missing = counter
    #print (missing)
    return missing