摘要: 已知$f_i = \prod \limits_{j = 1}^k f_{i - j}^{b_j}\;mod\;998244353$,并且$f_1, f_2, ..., f_{k - 1} = 1$,$f_k = a$,已知$f_n = m$,试求$a$ 阅读全文
posted @ 2019-02-01 08:01 remoon 阅读(1153) 评论(0) 推荐(0) 编辑