poj 2778 DNA Sequence AC自动机+DP+矩阵乘法 检测所有可能的n位DNA串有多少个DNA串中不含有指定的病毒片段
It'swellknownthatDNASequenceisasequenceonlycontainsA,C,TandG,andit'sveryusefultoanalyzeasegmentofDNASequence,Forexample,ifaanimal'sDNAsequencecontainssegmentATCthenitmaymeanthattheanimalmayhaveageneti