<p>hi,
esp. directed to the problem-solvers out there and those interested in competition math still, what books do you guys use? (zeitz's, etc..?) also, do you guys think it's still beneficial to practice high school problems (AIME, USAMO, etc..) as undergrads, or should I focus solely on putnam training? i guess it feels kind of weird to revert to high school stuff now that i'm in college....
thanks!</p>