排名:http://acm.sdut.edu.cn/sd2012/2013.htm 解题报告:http://www.tuicool.com/articles/FnEZJb A.Rescue The Princess(几何,向量) B.The number of steps(记忆化搜索,概率dp) C.Boring Counting(划分树) D.A-Number and B-Number E.Alice and Bob F.Mountain Subsequences(dp) G.Rubik’s…