Day 4

WARNING

Some problems from today’s contest will be in AtCoder Petrozavodsk Contest 1.

DO NOT DISCUSS PROBLEMS OUTSIDE OF THE TRAINING CAMP before the contest on AtCoder

UPD. Here is video-editorial http://opencup64.cs.istu.ru/~ejudge/81wzp02/notshown/180201en.avi

Most probably, there will be also pdf-editorial after tomorrow’s contest on AtCoder.

UPD. 2 Pdf-editorial from AtCoder. (English editorial is in the bottom half of the pdf-file).

Source codes: