摘要：题目链接：http://acm.hdu.edu.cn/showproblem.php?pid=1058 Description A number whose only prime factors are 2,3,5 or 7 is called a humble number. The sequen 阅读全文

摘要：http://poj.org/problem?id=1338 Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 22968 Accepted: 10218 Description Ugly numbers are numbers w 阅读全文