It might, but if you're going to evaluate all possibilities,
who cares? As in, if you are worried about a scenario such
as the following, where the 10 gets bagged "solo" despite
there being a -5 farther down the pipeline:
( [ 9 ], [ 10, -5], [ 11 ] )
in reply to Re: Re^2: Golf: Grocery Bagging
in thread (Golf) Grocery Bagging
Then later on you will inevitably evaluate a scenario where
the -5 is inserted earlier.
( [ 9, -5, 10 ],  )
So, taking the "brute force" approach, you might lose points
for style, but you get the job done, no?
Has anyone ever pointed out to a grocery checker that
the bagging problem was NP-complete? The result might be
similar to explaining that dogs can solve quadratic equations
(i.e. capturing a frisbee in a parabolic arc while in linear