湘潭大学

http://202.197.224.59/OnlineJudge2/index.php/User/register

http://acmpj.zstu.edu.cn/JudgeOnline/problemlist?volume=24

http://acm.hdu.edu.cn/listproblem.php?vol=1

http://acm.hdu.edu.cn/diy/contest_show.php?cid=18709