Hello Codeforces!

I am glad to invite you to participate in Spectral::Cup 2026 Round 3 (Codeforces Round 1110, Div. 1 + Div. 2), which will start on Jul/16/2026 17:45 (Moscow time). You will be given 2 hours and 30 minutes to solve 8 problems, where one problem will be split into subtasks. Also, there is at least one interactive problem, so you are recommended to read the guide to interactive problems if you have not encountered them before.

All problems are authored and prepared by myself.

Note the rule restricting the use of AI. If you are caught breaking this rule, you will be thrown into SSerxhs's basement. For your own well-being, I suggest adhering to the rules.

I would like to thank the following people for helping make this round possible!

• SSerxhs for his/her wonderful(?) coordination.
• NULL for translating the statements to Russian.
• StarSilk, EvenImage, tiger2005 for nutella testing.
• zeemanz, 0.1w33hw3, nifeshe, _istil, SATSKY_2025target_LGM for red testing.
• Seele_H, Proof_by_QED, GUAIKATTO, CReatiQ for orange testing.
• -WIDA-, Liang_SYEA, Argentum47, SpyrosAliv, wakanda-forever for purple testing.
• fr200110217102, simplelife, XiaoXia, acmtoohard, big-mktx for blue testing.
• yuki_Ishijo for cyan testing.
• Whalica for green testing.
• MikeMirzayanov for the incredible Codeforces and Polygon platforms.

Good luck!