HDU 杭电5584 LCM Walk【逆推】LCM Walk
http://acm.hdu.edu.cn/showproblem.php?pid=5584LCM WalkTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 518 Accepted Submission(s): 2