Elevator
http://acm.hdu.edu.cn/showproblem.php?pid=2494

Elevator Simulation
http://acm.hdu.edu.cn/showproblem.php?pid=1386

Tetris
http://acm.hdu.edu.cn/showproblem.php?pid=3013

Gates of Logic
http://acm.hdu.edu.cn/showproblem.php?pid=1886

Teacher YYF
http://acm.pku.edu.cn/JudgeOnline/problem?id=3746

中国象棋II
http://acm.fzu.edu.cn/problem.php?pid=1694

Typesetting
http://acm.hdu.edu.cn/showproblem.php?pid=2718

Connect
http://acm.hdu.edu.cn/showproblem.php?pid=2727

Hex Tile Equations
http://acm.hdu.edu.cn/showproblem.php?pid=2702

HTML Wrapper
http://acmicpc-live-archive.uva.es/nuevoportal/data/problem.php?p=4083