N is the length of string
M is the length of Regular expression.
In the worst case, a digraph G(V,E) may have |V|^2 edges
since DFS complexity is O(|V|+|E|), here will be O(|V|^2)
So in worst case, the the NFA complexity should be O(N*M^2)?
Am I understanding correct?
Thanks.
在NFA的Algorithms 4th结构中,边的数量最多为3M,因此得到的是O(NM)而不是O(NM ^ 2)。
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