ge lei zi yuan

introduction to OJ

http://acdream.info/topic/101

ji suan ji he mo ban

http://wenku.baidu.com/link?url=JNBUwmSX6uWJQXTjs3RmHqThCNydjlXb2f6rSt-SyKC1-KLraL42QCo2-DwVw_zdz-nIKfumlkmLJR1UfHpThyOXToh4xy04aQefK_d3wUS