2015年8月31日
Climbing Stairs
摘要： 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? 阅读全文
posted @ 2015-08-31 16:55 TinaYo 阅读(201) 评论(0) 推荐(0) 编辑