\documentclass{beamer}
\usetheme{metropolis}
\title{Connectivity Interdiction \& \\ Perturbed Graphic Matroid Cogirth}
\date{\today}
\author{congyu}
\institute{A\&L Group, UESTC}
\begin{document}
\maketitle
\section{Connectivity interdiction}
\begin{frame}{First Frame}
Hello, world!
\end{frame}
\section{Computing cogirth in perturbed graphic matroids}
\begin{frame}{Perturbed graphic matroids}
    some backgrounds
\end{frame}
\end{document}