We are excited to invite you to TOKI Mirror Open Contest (Unrated) — BNPC-HS 2021 Final Round on Saturday, October 16th 2021 13:05 UTC+7. The contest will be 5 hours long and will feature 10 problems. Note that you should participate in the contest individually. Scoring will be based on ICPC rules.

The problems were written by KerakTelor, Owmicron, Yoshiyuki, siplusplus, rfpermen, Berted, Nich728, VinsenN, and vioalbert.

Problem components were prepared by the Scientific Committee: rfpermen, Owmicron, ZeroScar, KerakTelor, jfcjaya, vistokartika, Littleboy123, vioalbert, VinsenN, and Yoshiyuki.

We would also like to thank:

• prabowo and fushar for their help in hosting the mirror contest;
• AVM.Martin for supervising the Scientific Committee;
• Ace_02, nirvana, BOBcool123, yumepeh, Hunkihas, keziaaurelia, kresna, alwyn, and Berted for testing the problemset and providing invaluable feedback;
• Binus University; and
• Every BNPCHS committee member, administrator, and manager.

BNPC-HS (Bina Nusantara Programming Contest for High School Students) is an annual competitive programming competition hosted by Binus University as part of BeeFest, a national-level competition for high school students.

We have put great effort into preparing this contest and we truly hope that you will enjoy it. See you in the contest!

UPD 1: Contest is over! Congratulations to our top 5!

1. emthrm
2. wiwitrifai
3. SamAnd
4. Luqman
5. Nirjhor

Editorial will be published soon.

UPD 2: The problemset is available for upsolving here.