DFA construction is O(2^m) in the worst case, where m is the size of the NFA. this is widely known in academic circles, but in practice, most people think well of DFAs because they are used in tools like grep that are optimized for the common case. but if you throw a large regex at them, they will blow up in size and become unusable. DFA matching is linear O(n) where n is the size of the input, and the constant is ~3-4 assembly instructions per character - faster than anything you could write by hand.
«Решетнев» рассказал о сборке спутника «Ямал-501»14:53
特朗普總統將摧毀伊朗導彈基地及阻止其發展核武列為美軍空襲行動的其他目標。，详情可参考Line官方版本下载
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