2019湖南ACM省賽部分題解(C,D,G,H)

C：Distinct Substrings（擴展KMP） 題目描述： For a string s 1 , s 2 , … , s n s_1, s_2, \dots, s_n s1​,s2​,…,sn​, Bobo denotes the number of its distinct substrings as f ( s 1 , s 2 , … , s n ) f(s_1, s_2, \dot

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