add elements in a list, using 0 as a break

hello!

i am working on a project that generates a series of binary numbers i.e. 1 0 1 1 0

i have collected these into lists

but i wish to export these in the format, using the example above, 1 2

another example just to make it clear would be that the system spits out 1 1 1 0 1, and i would want that to display as 3 1

basically, add adjacent numbers in the list but ignore 0

i'm sure there's a very obvious answer that i'm missing but if anyone can help, it would be massively aprpeciated!

thank you