The contest will last for two hours, and you will have five tasks to solve. The tasks are prepared by tianbu and me. This round is rated for participants whose rating is not higher than 2099.
We would like to thank:
Aleks5d for coordinating and helping us with the problems.
amgfrthsp for translating the statement
finally, MikeMirzayanov for great platforms Codeforces and Polygon!
It's the second time we hold our contest, our previous round Codeforces Round #670 (Div. 2).
We tried our best to make the statements short and clear, pretests strong and problems interesting. We hope you like the problems!
Score distribution will be announced shortly before the round.
Score distribution: 500-1250-1500-2000-(2000+1000)
Editorial is published Editorial
Congratulation to the winners:
Fine I have to admit that all the tasks were prepared by tianbu because I'm running out of good ideas these days.:(
tianbu is a genius. stO tianbu Orz