Question: Given a language L ? ? ? , we define Lhalf = { x | ?y ? ? ? , |y| = |x| such that

Given a language L ? ? ? , we define Lhalf = { x | ?y ? ? ? , |y| = |x| such that xy ? L }.

This is a DFA for L, please create a PDA for Lhalf.

Use the stack in the PDA to count up to half and pop elements after half.

Given a language L ? ? ? , we define Lhalf =

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