[摘要] You are climbing a stair case. It takesnsteps to reach to the top.Each time you can either climb 1 or 2 steps. In how many distinct ways can you climb[全文]
[摘要] 原文为：Java 101: The next generation: The essential Java language features tour, Part 2 Programming with typesafe enums and annotations in Java 5Annotati[全文]
