摘要：
http://acm.hdu.edu.cn/showproblem.php?pid=1698 Just a Hook Problem Description In the game of DotA, Pudge’s meat hook is actually the most horrible th 阅读全文
摘要：
http://acm.hdu.edu.cn/showproblem.php?pid=1394 Minimum Inversion Number Problem Description The inversion number of a given number sequence a1, a2, .. 阅读全文