a

Spoiler flag plz.

hint: don't use max(list), it's O(n) time complexity, and total will be $O(n^2)$ , time out.

and list.index(item) is $O(n)$, too.

Teshan_ss, please mark your posts as having spoiler content when posting code like that.

In binary, 0 = False/OFF and 1 = True/ON. In your code, this line to be exact, if item is 0:, will also count False in.

Using your code, an array of [False, 0] will return an array of [0, 0]. Hence, the extra zero.

Your result returned an extra 0 at the end of the array.