Climbing Stairs
摘要:
Climbing StairsYou 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 way... 阅读全文
posted @ 2014-11-12 15:38 luckygxf 阅读(163) 评论(0) 推荐(0) 编辑