Hello Codeforces,

We are very glad to invite you to participate in Hello 2024, which will start on Jan/06/2024 17:35 (Moscow time). You will be given 8 problems and 2.5 hours to solve them. One of the problems will be divided into two subtasks. The round will be rated for everyone. There will be at most 2024 interactive problems, so please read the guide for interactive problems before the contest.

All the problems are written and prepared by me.

We would like to give our sincere thanks to:

• errorgorn for his wonderful coordination!
• Alexdat2000 for translating problem statements.
• dario2994 for coming up with the solution to one of the problems.
• conqueror_of_tourist, iLoveIOI, Um_nik, oolimry, thenymphsofdelphi, Kaitokid, Brovko, Scintilla06, zengminghao, MarcosK, lanhf, beepbeepsheep, DylanSmith, kymmykym, CoDeRoK, wery0, kai824, teruel, asiad, priyanshu.p, chromate00, Blagoj, tibinyte, htetgm, Guevara74, Amrharb, Joshi503, BuzzyBeez, 18o3, nor, Kuroni for testing the round.
• dantoh, Myrcella, dario2994, dreamoon_love_AA, jamessngg, pavement, bensonlzl for testing a subset of the problems in 2022.
• MikeMirzayanov for the great codeforces and polygon platform.
• You for participating in the round.

The score distribution is $$$250 - 500 - 1000 - 1500 - 2250 - (1500 + 1500) - 4000 - 5000$$$.

Hope everyone will enjoy the round!