Problem I/S. 21. (November 2017)

I/S. 21. Subscribers can reach the text of the problem after signing in. The text will be public from November 28, 2017.]

(10 pont)

Deadline expired on December 11, 2017.

Statistics:

10 students sent a solution.
10 points:	Busa 423 Máté, Gáspár Attila, Horcsin Bálint, Janzer Orsolya Lili, Kiss Gergely, Ürmössy Dorottya.
5 points:	2 students.
2 points:	1 student.
0 point:	1 student.

Problems in Information Technology of KöMaL, November 2017