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2019年10月23日

摘要： A message containing letters from A-Z is being encoded to numbers using the following mapping: Given a non-empty string containing only digits, determ 阅读全文

posted @ 2019-10-23 21:52 lychnis 阅读(109) 评论(0) 推荐(0)

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 @ 2019-10-23 11:09 lychnis 阅读(103) 评论(0) 推荐(0)

2019年10月23日

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