2015年8月22日
Climbing Stairs
摘要： 题目：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 cl... 阅读全文
posted @ 2015-08-22 09:53 双音节的秋 阅读(124) 评论(0) 推荐(0) 编辑