(In reply to
re: No Subject by Ricci)
An unusual problem, I think it is necessary to use discrete mathematics to solve it. For those who are interested in what it is, I advise you to look for videos on Instagram in which experienced teachers teach the basics of discrete mathematics, I found there a couple of hundred such videos and almost all of them were posted by accounts that had about 40 thousand subscribers! I am sure this is because their owners used the services of https://soclikes.com/buy-instagram-followers to quickly increase the number of subscribers.
re(2): No Subject
