Шумбрат, Сәлам, Привет Codeforces!

We are pleased to invite you to participate in Codeforces Round 1103 (Div. 3) on Jun/12/2026 17:35 (Moscow time) — another Codeforces round for third division. You will be given 7-8 problems, which were prepared to create an interesting competition for participants with a rating 1599 or lower. However, those with a rating 1600 or higher can register for the round unrated.

The round will be hosted by rules of educational rounds (extended ICPC). Thus, all solutions will be judged on preliminary tests during the round, and after the round, there will be a 12-hour phase of open hacks. After the open hack phase, all accepted solutions will be rejudged on successful hacks. We tried our best to make reliable tests — just like you, we will be very disappointed if many participants' solutions are hacked after the ending of the contest.

You will be given 7-8 tasks for 2 hours and 30 minutes to complete them.

Note that the penalty for the wrong submission in this round is 10 minutes.

Remember that only the trusted participants of the third division will be included in the official standings table. As it is written by link, this is a compulsory measure for combating unsporting behavior. To qualify as a trusted participant of the third division, you must:

• take part in at least five rated rounds (and solve at least one problem in each of them)
• do not have a point of 1900 or higher in the rating.

Regardless of whether you are a trusted participant of the third division or not, if your rating is less than 1600, then the round will be rated for you.

Problems have been created and written by arsen1y, dvb1r and me.

We would like to thank:

• Vladosiya for excellent coordination.

• Friendiks and Treks for red testing.

• sqwiijqk, Arpa, Fakewave, sahasrad, yanb0, Egorsa and absolut3 for yellow testing.

• SapeginIgor, ElyesChaabouni and D_ck for purple testing.

• _bourrasque_, sh1n0a, OrleanMagic, string_eureka, stepan1111, BankaVarenya, Egorzykin, itz_pabloo, Timiguro, Datym, Ferume and ixeteny for blue testing.

• opa, WiseKid, furt1ve and Gordey_Leushin for cyan testing.

• KruPavel, mrskzv, HelloFromMars, mhmusanna, Chaynikov, Gosha2403, hsiFomeN and Everes for green testing.

• ilyamn22 for grey testing.

• MikeMirzayanov и KAN for Polygon and Codeforces platforms.

• And, of corse, thanks a lot You for participating!

P.S. try to match the authors in the following photo!

UPD. Editorial is posted!