摘要: Let's denote a function f(x)f(x) in such a way: we add 11 to xx , then, while there is at least one trailing zero in the resulting number, we remove t 阅读全文
posted @ 2019-05-09 20:57 陈墨cacm 阅读(182) 评论(0) 推荐(0) 编辑