It depends on the thickness of the books. If they are identical then, unless this is a trick question, it cannot be done.
You can determine symmetry of a data structure in two ways. One is when the stacks and queues data are put in the application and when the stacks are put in during run-time.
Let x equal the number of books and let y equal the final number of books. (2/3)x=y
One stack is a granum. Two or more stacks are called grana.
2 stacks required
jump in between them
On the shelf Row 2!
jump in the center of the two stacks of hay
By comparison, the two teams had equal records.
It is: 8/4 = 2
It is under two stacks of hay by a farmer. Slide the stacks apart by going in between them. There should be a door. Open it with the key you received earlier.
Supplementary angles
In the old days before this digital age, information was stored on paper. Vast repositories called libraries stored information, on every topic and for every purpose, in the form of books. The books were kept on shelves in the "stacks," and the key to knowing where in the stacks to look for a particular book was called the Card Catalogue, actually two card catalogues: one for authors and one for subjects. In the subject card catalogue, library books are listed according to their subject.