AtCoder Chronicles: ABC371 A-F Solutions

To celebrate hitting 1200 rating, here's the first 6 problems of ABC371, including a 2109 difficulty problem!
Progress tracker: kenkoooo.com/a...
Link to contest: atcoder.jp/con...
Music from Odysseus - Discovery Disc 1

[@pon4480]

OMG richard I wana be like you when I grow up!!!!!!!!

[@boostercookie]