What books are easy to learn Discrete Structures?

Question

Books

Good day) I still entered Bulgaria, I was late for school for a couple of days .. I missed a couple of lectures and came to 1 class - Discrete Structures. I didn’t understand half of it, it was a couple of exercises)
Actually, can you recommend a book / lectures / notes on Discrete Structures in Russian for someone who just finished 11 classes in a non-math class?
ps What materials did you use to study matan and discrete structures at the university?
pss Ready to learn and not easy :)

Answer 1

An extensive and interesting course Discrete Structures from a teacher from the Moscow Institute of Physics and Technology Alexander Dainyak.
Now I am going through it, having some background accumulated on the Educational program course in discrete mathematics . So, if Dainyak's course seems difficult, you can start with an educational program.

Answer 2

Готов учить и не легкое

Новиков Ф. А. Дискретная математика. СПб.: Питер, 2013.