byteplay_studios was streaming on youtube during the contest : https://www.youtube.com/watch?v=8249xj-tyS0 and selling the solution to audiences. A lot of div2(not sure about div1) people cheated by copy-pasting their solution (Especially on div2 E/F) (I think they subscribed to the channel to get the copy)

[user:vin_esh_32][user:AmmarAhmedTheSaviour][user:huytriet210][user:Nathako9n][user:KitKat_Cat][user:Utsav_Kashyap][user:Santhoshreddy18][user:nguyennhat182006][user:crazygmail.com][user:17070030370] I haven't finish reading all the solution by other people on F, but I am sure there will be more. Please ban them!!!