Hello, Codeforces! :-{D
As two important events IOI and ACM ICPC are coming soon, me and my friends as the Iranian IOI team decided to prepare a gift for all the Codeforces users who'll soon participate in one of these events, and also everybody else. :)
This round authored by me (havaliza), dani1373 and keivan with help from fab. I want to thank all the Codeforces team for their kind and great effort to maintain this website.
Hope you enjoy solving the problems as much as we're enjoying preparing them! ^.^
Update 1. The score distribution for Div. 1 is 500-1000-1500-2500-2500 and for Div. 2 its regular.
Update 2. Special thanks to Aksenov239 who helped us so much to prepare this round.
Update 3. Here is the editorial. To be completed soon :)