摘要: 考虑变换 $$\hat{A_x} = \sum_{i\ or\ x = x}{ A_i }$$ 记 $S_{t}(A,x) = \sum_{c(i,t)\ or\ c(x,t)=c(x,t),\ i \le |A|}{A_i}$则 $\hat{A} = S_{\lceil log_2n \rceil 阅读全文
posted @ 2018-07-10 10:21 lawyer' 阅读(207) 评论(0) 推荐(0) 编辑