已知\(f_i = \prod \limits_{j = 1}^k f_{i - j}^{b_j}\;mod\;998244353\)\(f_i = \prod \limits_{j = 1}^k f_{i - j}^{b_
阅读背景：
CF1106F Lunar New Year and a Recursive Sequence 线性递推 + k次剩余
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