Here is another person trying to sell solutions in the Codeforces Global round 14. I checked and found out that someone named Dark sights was in fact selling solutions .I tried to lure him to reveal his username but instead he showed me his submissions page. It took me around 5 minutes to track his id. His CF handle is https://mirror.codeforces.com/profile/Devilswiggy_Black. @MikeMirzayanov please have a look at it and instead of skipping his solutions ban him and his other id's from Codeforces.

Here Are The Proof's

https://ibb.co/NFPYNrs https://ibb.co/D1TntWG https://ibb.co/zZ4JjTh https://ibb.co/Q9V4rzD