Unlike Project Euler etc. where one really needs to be good at algorithms/math etc to make the most efficient code, else it will just run for days to brute force, most of advent of code can be solved with terrible algo as the input data is very small.
I think most CS grad students can solve Advent of Code. Some people, probably don't finish it not because it is hard, but probably because they lose interest.
I think most CS grad students can solve Advent of Code. Some people, probably don't finish it not because it is hard, but probably because they lose interest.