Today will be Codeforces Round #276, which take place in both divisions. Start time is 19:30 in moscow time (follow this link to see time in others zones). For preparing contest i say thanks to Zlobober, for translating to Delinur, and to MikeMirzayanov for project Codeforces.
Good luck to all, hope you will enjoy problems :)
UPD Score distribution will be dynamic (see more information here). Problems will be sorted in increasing order of difficulty, however, do not forget to read all problems before the end of the contest.
UPD The contest is over! Thanks to everyone who solved the problems despite everything. Analysis will be published later.
UPD Editorial can be found here.