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|    118                 (q0) edge [loop below] node[below] {$a$} () |    118                 (q0) edge [loop below] node[below] {$a$} () | 
|    119                 (q1) edge node[above] {$a$} (q2); |    119                 (q1) edge node[above] {$a$} (q2); | 
|    120     \end{tikzpicture} |    120     \end{tikzpicture} | 
|    121   \end{center} |    121   \end{center} | 
|    122  |    122  | 
|    123 \item \textbf{(Deleted for 2017, 2018)} |    123 \item \textbf{(Deleted for 2017, 2018, 2019)} | 
|    124   Given the following deterministic finite automaton over the |    124   Given the following deterministic finite automaton over the | 
|    125   alphabet $\{0, 1\}$, find the corresponding minimal automaton. In |    125   alphabet $\{0, 1\}$, find the corresponding minimal automaton. In | 
|    126   case states can be merged, state clearly which states can be merged. |    126   case states can be merged, state clearly which states can be merged. | 
|    127  |    127  | 
|    128   \begin{center} |    128   \begin{center} |