摘要：
DescriptionMany geometry（几何）problems were designed in the ACM/ICPC. Andnow, I also prepare a geometry problem for this final exam. According to theexperience of many ACMers, geometry problems are always much trouble, but thisproblem is very easy, after all we are now attending an exam, not a contest 阅读全文
摘要：
DescriptionBackgroundThe knight is getting bored of seeing the same black and white squares again and again and has decided to make a journeyaround the world. Whenever a knight moves, it is two squares in one direction and one square perpendicular to this. The world of a knight is the chessboard he 阅读全文