1.Give a natural PDA for the language { ambncs dt :m+n=s+t, m,n,s,t ≥ 0} For example,...

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Question

1.Give a natural PDA for the language { a^mbⁿc^s d^t :m+n=s+t, m,n,s,t ≥ 0} For example, aacd and abbbccdd are in the language

engineering Computer-Science

Answer 1

Answer #1

Above PDA accepts by empty stack

Pushing m+n A's onto the stack for a's and b's

Popping s+t A's for c's and d's.

If the stack is empty, accepting.

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Answer 2

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