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求0ms方法，这题数据大一点儿KMP就过不了了

Posted by killeryyzyyz at 2013-04-17 08:58:29 on Problem 3450 
用KMP，AC了，270ms
我本地生成一个4000×200的数据，KMP算了3s
只能说这题数据比较弱啊，应该有比KMP复杂度更低的算法吧？？？
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