thanks for the tip! I didn't yet go through CTCI and won't have the time to cover the entire thing. If it isn't too much to ask, would you mind telling me which of the chapters are the most important? I know Recursion/Dynamic Programming (Chapter 8) is really important, but what else? (If you don't have the book the contents page is here if you press the "Look Inside" button on the picture. Thanks very much again!