Ceva's Magical Training Index

Magic exists! Out My Limit!

Fight!!

Online Judge In Mainland China

http://acm.hdu.edu.cn

http://poj.org

http://acm.bnu.edu.cn/

http://acm.bjtu.edu.cn

http://acm.zju.edu.cn

http://hihocoder.com/

http://code.bupt.edu.cn/

http://vjudge.net

http://acdream.info/

http://www.lydsy.com/JudgeOnline/

Russian Online Judges

http://codeforces.com

http://www.spoj.com/

Others Online Judges

http://neerc.ifmo.ru

http://icpc.iisf.or.jp/

Open Train

http://opentrain.snarknews.info/

http://topcoder.com

Addition

生成树计数

LCT

SAM

带环图sg : async