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\begin{document}

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   \newpage
   \noindent
   \begin{center}
   \framebox{
      \vbox{\vspace{2mm}
    \hbox to 6.28in { {\bf CS 262: Computational Complexity
                        \hfill [Today's date]} }
       \vspace{4mm}
       \hbox to 6.28in { \hfill {\Large Homework [HW \#]} \hfill
               }
       \vspace{2mm}
       \hbox to 6.28in { {\it [Your name]} \hfill }
      \vspace{2mm}}
   }
   \end{center}
   \vspace*{4mm}

\begin{enumerate}
\item
Solution to problem number 1.
\end{enumerate}

\end{document}