摘要: Problem DescriptionOO has got a array A of size n ,defined a function f(l,r) represent the number of i (li) satisfy aimod aj=0,now OO want to know∑i=1... 阅读全文
posted @ 2015-07-21 19:47 Painting、时光 阅读(342) 评论(0) 推荐(0)