$4.$ Stack Size

Assuming push and pop below use a stack that is initially empty, what is the highest number of stack elements that will be used when running the following code

$1$ist $=[3,3,4,2,5,4]$

for element in list:

if element is odd:

push element to stack

else

ONE OOtion

old$\_$element pop item from stack

if old element element:

push element to stack