\author{Problem Author: Nick Wu}
\newcommand{\artinstallationheader}{Problem A: Art Installation}

\begin{frame}{\artinstallationheader{}}
  \begin{block}{Problem}
    \begin{itemize}
      \item An art installation requires $r$ red LEDs, $g$ green LEDs,
      and $b$ blue LEDs. Given some red LEDs, green LEDs, blue LEDs,
      and the ability to buy 
      LEDs that can be either red or green or
      LEDs that can be either green or blue, compute the mininmum
      number of LEDs to buy to satisfy the art installation requirements.
    \end{itemize}        
  \end{block}
\end{frame}
\begin{frame}{\artinstallationheader{}}
  \begin{block}{Solution}
    \begin{itemize}
      \item If we need any red LEDs, those can only be obtained buying the
      LEDs that can be either red or green.
      \item If we need any blue LEDs, those can only be obtained buying the
      LEDs that can be either green or blue.
      \item Buy LEDs according to the above, and then the green ones
      can be bought from either.
    \end{itemize}        
  \end{block}
\end{frame}
