As you see, states Q1 to Q4 are accepted and Q5 is a kind of trap. This automaton accepts strings that have no more than 3 consecutive zeros.
Can anybody help finding a regular expression for this?
Note : What I tried ...
I defined A:=(0+00+000)
So the automata accepts the strings which contain no consecutive A's. But I don't know how to find that kind of regular expression.