Wilujeng Wengi, Codeforces!

We are excited to invite you to TOKI Regular Open Contest #43 (based on Arkavidia 10.0)!

For those of you who don't know, Arkavidia is a national contest for university students in Indonesia.

Key details: - Contest link: TLX - Time: 8th February 2026, 19:05 UTC+7 - Writer: @kindanameless, @akunorangganteng, @bakwankrispi, @AldyPy, @Valz05, @FaqihMSY - Duration: 2 hours 15 minutes - Problems: 8 - Allowed languages: C, C++11, C++17, Pascal, Java, Python 3, Go - Scoring distribution: 100 — 200 — 400 — 500 — 600 — 700 — 800 — 800

Many thanks to: - @pyqe for help- ing coordinate the TROC contest - @aufannn @Romy67 @Wibo @Jteh for testing the problems and giving feedback. - @fushar for the TLX platform. - Bandung Institute of Technology, all the local committees, administrators, and managers of the whole COMPFEST event.

ARKAVIDIA itself is an annual event hosted by Bandung Institute of Technology. It is one of the largest student-run IT events in Indonesia and competitive programming contest is one of the competitions hosted.

Please register for the contest and I encourage you to read all problems! Mugia sukses tur bungah!