I like AoC because it is the least 'know the specific maths trick' of the various coding challenges out there; there are normally a couple of problems like that

I like AoC because it is the least 'know the specific maths trick' of the various coding challenges out there; there are normally a couple of problems like that each year, but most can be worked out if you can think even if you don't have a huge body of maths knowledge.