I am very glad to invite you to the Codeforces Round #843 (Div. 2), which will take place in Jan/10/2023 14:15 (Moscow time). This round will be rated for the participants with rating lower than 2100.
My sincere thanks to:
BaluconisTima for the splendacious pictures, which complement each problem.
MikeMirzayanov for Codeforces and Polygon platforms.
You for participating in this round.
You will have 2 hours and 30 minutes for solving 6 tasks, one of which will be divided into easy and hard verions. The round is based on the problems from the first day of Belarusian Regional olympiad. We kindly ask all Belarusian pupils who participated in this olympiad, to refrain from taking part in this round and discussing the problems publicly before the round ends.
I hope you will enjoy the round!
Score distribution: (500+1000)-1000-1500-2000-2000-2500.
UPD. Score distribution was changed: (500+500)-1000-1500-2000-2250-3000.
UPD2: Congratulations to the winners!
Div. 1 + Div. 2:
First place: jiangly
Second place: YamadaRyo
Third place: SSRS_
Forth place: BurnedChicken
Fifth place: Vercingetorix
Sixth place: toam
Seventh place: liuhengxi
First place: YamadaRyo
Second place: wygz
Third place: Final_Brave_Niuniu
Forth place: xiachong
Fifth place: realskc
Sixth place: scli
Seventh place: SolarFlea
Vote for your favourite task!
UPD3: Finally, here is the editorial: press here