摘要: 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 阅读全文
posted @ 2016-06-17 11:08 健康平安快乐 阅读(226) 评论(0) 推荐(0) 编辑