I am studying combinatorics in my class right now and am using Combinatorics by Van Lint and Wilson. I was wondering if any of you guys had any recommendation on a supplementary book for topics like generating functions, enumerative combinatorics in general and extremal combinatorics? I am looking especially for a book with a lot of exercises so that I can practice solving problems.
Thanks!
Van Lint and Wilson is really great, but you may also like Enumerative Combinatorics Volumes I and II by Richard Stanley. Generatingfunctionology by Wilf is second to none for generating functions specifically.