摘要： http://acm.hdu.edu.cn/showproblem.php?pid=1058Humble NumbersTime Limit: 2000/1000 MS (Java/Others)Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 6988Accepted Submission(s): 3048Problem DescriptionA number whose only prime factors are 2,3,5 or 7 is called a humble number. The sequence 阅读全文