2018年2月24日
70. Climbing Stairs
摘要： Description: 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 wa 阅读全文
posted @ 2018-02-24 11:53 SuperStar~ 阅读(114) 评论(0) 推荐(0)