On 3rd December, 18:00 at Moscow will be Codeforces Round #281 (Div. 2). As usual Div. 1 contestants can take part out of contest.
This is my first Codeforces Round and I hope that this isn't the last one :)
UPD1: The scoring will be dynamic.
UPD2: Contest is over. Thank to all participants. I hope you liked my contest.
UPD4 Top-5 contestants, congrats
Also congrats to gaoyihan, who solved problem E.