2018年8月25日
Count Numbers(矩阵快速幂)
摘要： Count Numbers 题目描述 Now Alice wants to sum up all integers whose digit sum is exactly ab .However we all know the number of this kind of integers are u 阅读全文
posted @ 2018-08-25 21:29 lglh 阅读(333) 评论(0) 推荐(0) 编辑