\newcommand{\IMPORTANT}{%\noindent\textbf{Important:}\begin{itemize}\item Make sure the files you submit can be processed by just calling\\ \mbox{\texttt{scala <<filename.scala>>}} on the commandline.\footnote{All major OSes, including Windows, have a commandline. So there is no good reason to not download Scala, install it and run it on your own computer. Just do it!} Use the template files provided and do not make any changes to arguments of functions or to any types. You are free to implement any auxiliary function you might need.\item \textbf{Do not leave any test cases running in your code because this might slow down your program!} Comment out test cases before submission, otherwise you might hit a time-out.\item Do not use any mutable data structures in yoursubmissions! They are not needed. This means you cannot create new \texttt{Array}s or \texttt{ListBuffer}s, for example. \item Do not use \texttt{return} in your code! It has a different meaning in Scala than in Java.\item Do not use \texttt{var}! This declares a mutable variable. Only use \texttt{val}!\item Do not use any parallel collections! No \texttt{.par} therefore! Our testing and marking infrastructure is not set up for it.\end{itemize}}\newcommand{\IMPORTANTEXAM}{%\noindent\subsubsection*{Important}\begin{itemize}\item Make sure the files you submit can be processed by just calling\\ \mbox{\texttt{scala <<filename.scala>>}} on the commandline. Use the template file provided and do not make any changes to arguments of functions or to any types. You are free to implement any auxiliary function you might need.\item Do not use any mutable data structures in yoursubmission! They are not needed. This means you cannot create new \texttt{Array}s or \texttt{ListBuffer}s, for example. \item Do not use \texttt{return} in your code! It has a different meaning in Scala than in Java.\item Do not use \texttt{var}! This declares a mutable variable. Only use \texttt{val}!\item Do not use any parallel collections! No \texttt{.par} therefore!\end{itemize}}\newcommand{\DISCLAIMER}{%\subsubsection*{Disclaimer}It should be understood that the work you submit representsyour \textbf{own} effort! You have not copied from anyone else. Anexception is the Scala code I showed during the lectures oruploaded to KEATS, which you can freely use.\bigskip}\newcommand{\DISCLAIMEREXAM}{%\subsubsection*{Disclaimer}It should be understood that the work you submit representsyour \textbf{own} effort! You have not copied from anyone else. Anexception is the Scala code I showed during the lectures oruploaded to KEATS, which you can freely use.\medskip\noindentDuring the exam you may \textbf{not} communicate with other people: no email,instant messaging, discussion forums, use of mobile phones, etc.\bigskip}