2015年7月19日
Making Sequences is Fun373B
摘要： We'll defineS(n)for positive integernas follows: the number of then's digits in the decimal base. For example,S(893) = 3,S(114514) = 6.You want to mak... 阅读全文
posted @ 2015-07-19 13:51 cyd2014 阅读(201) 评论(0) 推荐(0)