4 ms·
Titu Andreescu has some good problem books. You might like 102 Combinatorial Problems, http://www.amazon.com/102-Combinatorial-Problems-Titu-Andreescu/dp/08176
by jlhamilton 18y ago
Titu Andreescu has some good problem books. You might like 102 Combinatorial
Problems, http://www.amazon.com/102-Combinatorial-Problems-Titu-Andreescu/dp/0817643176 http://www.amazon.com/102-Combinatorial-Problems-Titu-Andree...,
if you like Concrete Mathematics, and it's fairly small to carry.