Hello Codeforces!
SlavicG and I are glad to invite you to Unofficial Div 4 Round #2. Which will take place this Wednesday at 14:35 UTC (The round is over now, but you can still participate virtually). The round will not be rated for any participants since it is unofficial.
Contest link: https://codeforces.net/gym/102873
You will be given six tasks and two hours to solve them. The problems were created and prepared by mesanu and SlavicG for users with a rating range from 0 to 1400 but anyone is welcome to participate in the round!
We want to thank everyone who was involved in the round preparation:
Errichto for thorough testing and publishing this round on the gym.
Also, after the contest Errichto will post videos about this contest and the responsibilities of a tester.
Brodicico for help with problems and testing the round.
And a huge thank you to the testers: Errichto, Monogon, galen_colin, gupta_samarth, arujbansal, Chihai_Ion and Grumpah .
MikeMirzayanov for Polygon and Codeforces platforms.
Even though the contest is unrated, we believe it is an excellent way of practice, especially for Div 4 users.
Remember, if you don't know how to solve one problem, look at others!
UPD: Registration available now!
UPD: Round is over! We hope you enjoyed the problems and congratulations to the winners!
UPD: Editorial is out!
Div. 4 winners:
Not Div.4 Winners:
First to solve each problem:
A: First: Valera_Grinenko
Div. 4 first: anuragdvd
B: First: Geothermal
Div. 4 first: Esdeath_1
C: First: Geothermal
Div. 4 first: Esdeath_1
D: First: Geothermal
Div. 4 first: RamPrabodhInduri
E: First: Geothermal
Div. 4 first: -deleted-
F: First: IgorI
Div. 4 first: sahaun