摘要: Define the function S(x)S(x) for xx is a positive integer. S(x)S(x) equals to the sum of all digit of the decimal expression of xx. Pl... 阅读全文
posted @ 2017-09-16 16:14 衣带渐宽、为伊憔悴 阅读(147) 评论(0) 推荐(0) 编辑