摘要: 2226: [Spoj 5971] LCMSum Description Given n, calculate the sum LCM(1,n) + LCM(2,n) + .. + LCM(n,n), where LCM(i,n) denotes the Least Common Multiple 阅读全文
posted @ 2018-03-23 23:27 zbtrs 阅读(217) 评论(0) 推荐(0) 编辑