Коточигов А. М., Левицкий Д. В., Носова О. А. Sharing code: A group of people must find out a secret code by analyzing a table available to all. Each participant knows his line in the table and one word from the code. A participant is allowed to announce to all others only one of two messages — s/he knows the code or does not know it. The article describes an algorithm allowing the construction of the table, with the help of which, after a few exchanges of messages, all participants will recognize the code. // Computer Tools in Education. St. Petersburg, Russia, 2017. № 5. Pp. 5-11.