I'm glad to invite you to our first contest Codeforces Round #684 (Div. 1) and Codeforces Round #684 (Div. 2) which will be held at Nov/17/2020 17:35 (Moscow time) . The problems are invented and prepared by AliShahali1382, Mehrdad_Sohrabi, and Mohammad.H915. The round is rated for both divisions. You will be given 5 problems and 2 hours 15 minutes to solve them. I recommend you to read all the problems :)
Firstly I'd like to thank isaf27 for coordinating and reviewing the round, as well as helping with many different things.
Finally, thanks to MikeMirzayanov for very nice and convenient Codeforces and Polygon platforms.
I hope you all will find the problems interesting. I wish you high scores and good luck!
Div. 1: (500-500)-1250-1750-2500-2500
Div. 2: 500-1000-(750-750)-2000-2500
UPD : Editorial is out.