1002liu - 博客园

2013年5月28日

摘要： Problem Description A number whose only prime factors are 2,3,5 or 7 is called a humble number. The sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 25, 27, ... shows the first ... 阅读全文

posted @ 2013-05-28 23:00 1002liu 阅读(133) 评论(0) 推荐(0) 编辑