How do I add the elements of several lists in python

I am trying to calculate the total number of convergent hailstone sequences. In the code below I am determining whether a sequence is convergent or divergent for different values of a, b, and x and outputting a list (seems to be a list of lists with one element in each sublist). My issue here is I can't seem to find the TOTAL number of convergent sequences. I would like to add all the 1's in my list and output the final value to obtain this answer. Can anybody please help?

P.S. In the output below, 1 = convergent 0 = divergent.

Here's my code:

def hailstone(a, b, x):
    list = []
    c = 0
    count = []
    for i in range(1, 100):
        if x%2 == 0:
            x = x/2
        else:
            x = a * x + b
        if x not in list:
            list.append(x)
        else:
            break
    if len(list) < 99:
        c = 1 + c
        count.append(c)
    else: pass
    return(count)

def run():
    for a in range(1, 4):
        for b in range(1, 4):
            for x in range(1, 4):
                print(hailstone(a,b,x))      

run()

Here's the output

[1]
[1]
[1]
[]
[]
[]
[1]
[1]
[1]
[]
[]
[]
[1]
[1]
[1]
[]
[]
[]
[1]
[1]
[1]
[]
[]
[]
[1]
[1]
[1]

Also, here's the data type for my list count:

<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>