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by daveFNbuck
1003 days ago
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They show the DFA for it on the site, it's 3 states. There's a starting state for the first . and then two states that transition back and forth between whether z was the last character or not. I think what's actually happening here is that they're doing the intersection on the DFAs and then producing a regex from the resulting DFA. The construction of a regex from a DFA is where things get ugly and weird. |
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