Hello, Codeforces!

We are happy to invite you to TheForces Round #41 (Magical-Forces), which will take place on Mar/30/2025 18:05 (Moscow time)

UPD: Due to a conflict with the AtCoder round, the start time has been postponed by 30 minutes.

You will have 135 minutes to solve 6 problems. One of the problems will be divided into subtasks.

One of the problems may be interactive. So, please refer to the guide on interactive problems if you are unfamiliar with them.

Note: Some problems have occurred in OCPC Fall 2024. If you have participated in it, you should not participate in this contest.

The round is TheForces rated! After the round you can find your rating changes here.

Prizes: The participant in the $$$i$$$th place will receive $$$2^{3-i}$$$ dollars $$$(1 \leq i \leq 3)$$$ as a prize. In addition, we will randomly select $$$\lfloor \frac{p}{30} \rfloor$$$ lucky participants and give each of them $$$1$$$ dollar as a prize, where $$$p$$$ is the number of participants. Please actively participate :)

For more details about TheForces prize, read the above spoiler and join TheForces!

• The problems are authored by wuhudsm, imranakki,xksark,ProofByContradiction_,Davy_D._Kaosar.

• The cool poster by Amir_Parsa.

• We would like to thank our army of testers: Too_Weak_To_Anything, N29,wakanda-forever, xksark, yashbihany, 61shine, delwar_03_, dernier_jour, DenimFlame12, anuragak021, RD_TheCoder, nik4o, akane646, FP7317.

• Also we want to thank You for participating in our round.

In other exciting news:

• We've just launched our official Telegram channel! We invite you to join us there as well, so we can expand our community and conquer Telegram alongside Codeforces and Discord! 💪

Discord Server ($$$2500+$$$ members)

TheForces website

Contests' archive

UPD:

Editorial

Congrats for the winners!

1. MagnusCarlsen321

2. Horka

3. IzhitskiyTimofey

And $$$4$$$ lucky participants:

Manas_DixiT

gupta_vatsal

cry

roshan_j_

(Pls dm wuhudsm for your prize : ) )