(cf1139d) Steps to One

03-03

(sp4168)Square-free integers

02-22

(CF906D)Power Tower

12-21

(luogu2569) 股票交易

11-14

(cf372c) Watching Fireworks is Fun

11-14

(luogu5495) Dirichlet 前缀和

11-14

(CF940F)Machine Learning

10-26

(luogu4551)最长异或路径

10-25

(luogu4587)神秘数

10-24

(luogu2839)middle

10-22