the quadratic blowup requires a pathological pattern and a structured input that's long enough to cause a problem. you need both halves. take a pattern like [A-Z][a-z]+: every match starts at an uppercase letter and ends the moment the engine sees something that isn't lowercase. there's no ambiguity about where a match ends, so the engine never rescans the same input. for this pattern, the quadratic case is actually impossible. most real-world patterns share this property.
Администрация США и израильские власти предпринимают усилия, чтобы не допустить втягивания йеменского движения «Ансар Аллах» (хуситов) в войну против Ирана.
国产激光武器实弹演示 "洗衣机型"装置展现真实威力，推荐阅读金山文档获取更多信息
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