If you haven't read "Great unsolved problems in computer science", I'd highly recommend it: http://algeri-wong.com/yishan/great-unsolved-problems-in-computer-sc

If you haven't read "Great unsolved problems in computer science", I'd highly recommend it: http://algeri-wong.com/yishan/great-unsolved-problems-in-computer-science.html http://algeri-wong.com/yishan/great-unsolved-problems-in-com... TL;DR: calendaring is hard. really hard.