2019年1月13日
70. Climbing Stairs
摘要： 题目描述： 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 阅读全文
posted @ 2019-01-13 13:54 侧耳倾听5 阅读(134) 评论(0) 推荐(0)