为什么80%的码农都做不了架构师？>>> Java Web编程技术 该文档重点讲解如何自定义标签的开发，包括简单标签的开发、TLD文件、几种常见类型标签的开发。对其内容详细阅读 转载于:https://my.oschina.net/u/856019/blog/132082

题目：You are climbing a stair case. It takes n steps to reach to the top. Each time you can either climb 1 or 2 steps. In how many distinct ways can you climb to the top? 题解：这道题就是经典的讲解最简单的DP问题的问题。。假设梯子有n层，