Hello Codeforces!

I'm glad to invite you to participate in Codeforces Round #665 (Div. 2) taking place on Friday, August 21, 2020 at 07:35UTC-7. The round is rated for users whose rating is lower than 2100.

All problems were mainly created and prepared by me, and I'd also like to thank:

adedalic for coordinating and reviewing the round,

AmShz, growup974, dorijanlendvaj, Osama_Alkhodairy, Mohamed.Sobhy, pikmike, kdjonty31, csani, BledDest, saurabhshadow, postscript, errorgorn for testing the problems and giving feedback,

MikeMirzayanov for Codeforces and Polygon platforms,

All users for participating in the contest!

You will be given 6 problems and 2 hours to solve them. The score distribution will be announced closer to the start of the round.

Good luck, and have fun!

UPD1 : Score distribution is 500 — 1000 — 1500 — 1750 — 2500 — 2500.

UPD2 : Editorial

UPD3 : System testing has finished. We hope you enjoyed the contest :)

UPD4 : Congratulations to the winners!

Div.1 (Out of competition)

I_love_chickpea Egor jiangly Geothermal dlalswp25 antontrygubO_o ashmelev Maksim1744 Heltion SSRS_ Div.2

gamegamewillwinioi2020 altair-chan CongLingDanPaiShang2k5 rainboy kissenok Noche_5 ghj1222 nitinjan06 Rchen3 Gotz_X