Hello, Codeforces!
We, the RiOI team, are proud to invite you to participate in Codeforces Round 1046 (Div. 1) and Codeforces Round 1046 (Div. 2) which will be held on Aug/28/2025 17:35 (Moscow time).
The round will be rated for everyone. You will be given 6 problems in both divisions, where some problems will be divided into subtasks, and 3 hours to solve them. For both divisions, the number of interactive problems will not be equal to 1, so you may need to read the guide for interactive problems before the contest.
The problems are authored and prepared by Register, STUDENT0, Error_Yuan, _istil, and Alan_dong.
We would like to thank:
- Error_Yuan for his great coordination.
- Alexdat2000 for Russian translation.
- Um_nik, errorgorn, SSerxhs, dorijanlendvaj and conqueror_of_tourist for red-black testing.
- _l_l_, E_fireworks, rui_er, Markadiusz, __baozii__, lethan3, SomethingNew, YuukiS, tfg, Sana, maomao90, A_G and FairyWinx for red testing.
- NobodyThere, wangmarui, ikrpprppp, Kolychestiy, cry, hocln, Makcum888 and beaaaan for orange testing.
- madlogic, Wf_yjqd, pacha2880, Edeeva, windreaper and denk for purple testing.
- chromate00, SunsetVoice_ and Non-origination for blue testing.
- Mohamed_Saad62 for cyan testing.
- houran for green testing.
- MikeMirzayanov and KAN for the great platforms.
- You for participating!
Special thanks to __baozii__ for his help during the preparation!
The scoring distribution is below.
- Div. 2: 500 — 1000 — 1500 — 2000 — 2750 — (2250 + 1750).
- Div. 1: 500 — 1000 — 1750 — (1250 + 1250) — (3000 + 2000) — 4000.
Good luck & Have fun! (∠・ω < )⌒☆
UPD 1: Editorial was published.
UPD 2: Congratulations to the winners!
Div. 1:
Div. 2:
