Common Subsequence
題目鏈接 Description A subsequence of a given sequence is the given sequence with some elements (possible none) left out. Given a sequence X = < x1 ...
原文：CF 346B. Lucky Common Subsequence(DP+KMP)
這題確實很棒。。又是無想法。。其實是AC自動機 DP的感覺，但是只有一個串，用kmp就行了。 dp i j k ，k代表前綴為virus k 的狀態，len表示其他所有狀態串，處理出Ac len 數組來，DP就可以了。狀態轉移那里一直沒想清楚，wa了很多次，記錄路徑倒是不復雜，瞎搞搞就行。 ...
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