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 cl 阅读全文
posted @ 2016-04-30 16:41 Sheryl Wang 阅读(107) 评论(0) 推荐(0) 编辑