Codeforces Round #684[Div1 and Div2]
Difference between en2 and en3, changed 15 character(s)
$$~-\text{In the name of God}~-$$↵

Hello Codeforces,↵

I'm glad to invite you to our first contest [contest:1439] and [contest:1440] which will be held at [contest_time:1439] . The problems are invented and prepared by [user:AliShahali1382,2020-11-15], [user:Mehrdad_Sohrabi,2020-11-15], and [user:Mohammad.H915,2020-11-15]. The round is rated for both divisions. You will be given **5 problems** and **2 hours 15 minutes** to solve them.↵

Firstly I'd like to thank [user:isaf27,2020-11-15] for coordinating and reviewing the round, as well as helping with many different things.↵

Thanks for our testers [user:300iq,2020-11-15], [user:growup974,2020-11-15], [user:Atreus,2020-11-15], [user:Shayan.P,2020-11-15], [user:postscript,2020-11-15], [user:morzer,2020-11-15], [user:BledDest,2020-11-15], [user:UnstoppableChillMachine,2020-11-15], [user:MAMBA,2020-11-15], [user:Prabowo,2020-11-15], [user:WNG,2020-11-15] for testing and giving very helpful advice.↵

Finally, thanks to [user:MikeMirzayanov,2020-11-15] 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!↵

Scoring distribution:↵

**Div. 1**: (500-500)-1250-1750-2500-2500↵

**Div. 2**: 500-1000-(750-750)-2000-2500


  Rev. Lang. By When Δ Comment
en7 English AliShahali1382 2020-11-18 02:15:57 0 (published)
en6 English AliShahali1382 2020-11-18 02:14:22 76 (saved to drafts)
en5 English AliShahali1382 2020-11-15 23:49:55 44
en4 English isaf27 2020-11-15 23:25:25 1
en3 English AliShahali1382 2020-11-15 23:24:49 15 (published)
en2 English AliShahali1382 2020-11-15 23:17:09 583
en1 English AliShahali1382 2020-11-15 23:07:14 813 Initial revision (saved to drafts)