\documentclass{article}

\usepackage[T1]{fontenc}
\usepackage[ngerman]{babel}
\usepackage[utf8]{inputenc}

\usepackage{color}
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\definecolor{darkgreen}{rgb}{0.23,0.62,0.22}

\usepackage{scrpage2}
\pagestyle{scrheadings}
\clearscrheadfoot
\ihead{Karlsruhe Institute of Technology}
\chead{ChaosKITs}
\ohead{\pagemark}

\usepackage{listings}
\lstset{
	language={C++},
	numbers=left,
	stepnumber=1,
	numbersep=6pt,
	numberstyle=\footnotesize,
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\usepackage[top=2cm, bottom=2cm, left=2cm, right=1cm]{geometry}

\title{Team Contest Reference}
\author{ChaosKITs \\ Karlsruhe Institute of Technology}

\begin{document}

\maketitle
\tableofcontents
\newpage

\input{datastructures/datastructures}
\input{graph/graph}
\input{geometry/geometry}
\input{sonstiges/sonstiges}

\end{document}