hell-o!
I was prompted to find an error by discussing my
question asked on the Vasma forum.
The discussion on RSDN confirmed my speculations about the error in the book.
although, whether it is a mistake, or just an unpleasant typo when publishing - it remains only to guess.
ps: tried to post C ++ sorets here, but unfortunately found that Habr _ incorrectly displays C ++ sorts, despite the fact that they are enclosed in the corresponding pair of tags. A couple of tags for quoting also do not plow.
need something to do with it, tovarischi.