I wrote a neat solution to the 3rd Q in the coding challenge. Except I brainfarted and skimmed a StackOverflow answer that made me think `dict.update` added dict values together and not replaced them. Realized it too late, immediately after I submitted...

Overall a pretty cool, compilers-esque coding challenge! Way better than the Leetcode stuff - gives me a pretty positive impression of the company. Hope I can apply again soon.