
For security in the wagon the prowodnitsa is responsible. When you enter the train she takes your ticket and assignes a bed to you. Wagon and bed number are printed at your ticket but sometimes you will get another bed, so that groups with beds in different compartments can move into one at least. On bord of the train it's very narrow so it doesn't make sense to get on hasty. Keep cool and rest and you'll be welcome.
At stops the prowodnitsa counts the people who go out and in. To avoid confusion and delays you should use the same door when leaving and return to train.