Hellowo Codeforces o7

cry, larush, chromate00, LMeyling, Lilypad, and I are ebullient to welcome you to participate in Codeforces Round 998 (Div. 3) at Jan/19/2025 17:35 (Moscow time). We have cooked up $$$7$$$ problems to be solved in $$$2$$$ hours and $$$30$$$ minutes.

The round will be hosted by rules of educational rounds (extended ICPC). Thus, solutions will be judged on preliminary tests during the round, and after the round, it will be a 12-hour phase of open hacks. After open hacks all accepted solutions will be rejudged on successful hacks.

Note that the penalty for each wrong submission in this round is 10 minutes. Also, note the rule restricting AI use!!! If you are caught using AI in an unorthodox manner, you will be banished off the face of the earth (trust me).

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 rating of 1900 or higher at any moment in time.

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 (unless you register unrated).

We would like to orz the following individuals for making the contest possible:

• Vladosiya for coordinating our round.

• Our army of testuwuers: [VIP] awesomeguy856, [VIP] Dominater069, omeganot, Error_Yuan, Intellegent, -firefly-, amoeba4, 18o3, efishel, Edeeva, yoru_sacri, Abhishek_Srivastava, Vladosiya, macaquedev, DivinePunishment, Filikec, reirugan, pianapolataa, ETL, and Rahuldeb5,

• (MVP+++) MikeMirzayanov for developing the platform that will soon host Codeforces Round 1000.