Sounds like me. Except, I cant really use Soviet style problem books in America. I would get accused od educational harrassment.
Seriously, precollege science education in US is the funniest joke ever. Kids get to college, god forbid they get challenged a tad bit. They start crying and complaining, you lose your job. (I am not exaggerating. They literally start crying.)
Was “Irodov” the problem book your professor used? That book is legendary. Epic problems.