摘要: 131072K A digit sum S_b(n)Sb​(n) is a sum of the base-bb digits of nn. Such as S_{10}(233) = 2 + 3 + 3 = 8 S10​(233)=2+3+3=8, S_{2}(8)=1 + 0 + 0 = 1S2 阅读全文
posted @ 2019-09-16 20:29 liyexin 阅读(364) 评论(0) 推荐(0)