kudoos for not importing like nearly everyone else

Thank you for explaining, jolaf, I think the stack concept is going to come in handy when keeping track of things that can be thought of as pairs. The dictionary pairings was a 'key' insight as well. I'm thinking this might work for higher order tuples as well. Its like counting sets, where once you have a complete set, you throw(pop) them away. Could perhaps do a left-append and left-pop as well when there are 4 of a kind. Though it probably is better to switch to an table or something like that for more complex accounting.

Anyone want to explain how this is working? I get lost at "elif not stack or stack.pop() != b:" and I don't get how "not stack" returns True

Either you were being ironic when you all voted this up, or you are a Drumpf voter and have a loose grip on reality

adding arguements seems like cheating to me

So a list of lists can still be indexed as if it was a flat list??

Almost a triangle; I thought it was an art project; maybe codewars is becoming an artistic ai

Best documentation award