Hello, Codeforces! We are pleased to invite you to Codeforces Round 957 (Div. 3), which will be held on Jul/11/2024 17:35 (Moscow time).
The round will be hosted by rules of educational rounds (extended ICPC). You will be offered 7 problems, which I with Noobish_Monk, ErnKor, Kmes and ArSarapkin have prepared for you.
The rules of the third division are:
The penalty for a wrong submission is 10 minutes.
12-hour phase of open hacks after the end of the round (hacks do not give additional points)
after the end of the open hacking phase, all solutions will be tested on the updated set of tests, and the ratings recalculated.
Reminding you, that only trusted participants of the third division will be included in the official standings table. This is a forced 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 (or you are a newcomer/unrated), then the round will be rated for you.
We would like to thank everybody, who helped in preparing this round:
Our coordinators, Gornak40 and Vladosiya for a wonderful coordination!
MikeMirzayanov for wonderful Polygon and charming Codeforces!
Vladosiya for deleting the lore in almost all of the problems...
Our numerous testers: natalina, FairyWinx, Kosya, ErnKor, 74TrAkToR, ArSarapkin, mainyutin, senjougaharin, gaiercop, mikeamir0310, Maksim_Musikhin, Arina77, artimovich.ko, main-scobik, savanzh, petr_davydov, Pronkin_dv, kalita.georgy, kuznetsov.da, s_w_a_n_i_k, Keopint, VolkovMA, kuewa, cry, Harsh_kunwar, Kon567889, dshindov, OAleksa, SajidAbdullah, fishcurry, george_the_piggy, k1sara and many others, who didn't mention their handle.
Special thanks for KEFedorov, for inviting more than 35 testers.
Good luck!
UPD1 After the end of the round, Shayan will broadcast the solutions, a recording will also be available, but we will also prepare a textual editorial.
UPD2 Video Discussion by Shayan
UPD3 Video of solving the round + Editorial by the "winner" of this round, neal
UPD4 Editorial.
UPD5 Congratulations for the winners:
Official:
Official + Unofficial:
