2018年9月10日

70. 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 @ 2018-09-10 11:26 jydd 阅读(69) 评论(0) 推荐(0) 编辑

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