摘要：
Problem A: How do you add?Larry is very bad at math - he usually uses a calculator, which worked well throughout college. Unforunately, he is now stru... 阅读全文
摘要：
Problem I: Ingenuous CubrencyPeople in Cubeland use cubic coins. Not only the unit of currency is called acubebut also the coins are shaped like cubes... 阅读全文