\documentclass{report}
\usepackage[a4paper, margin=1in]{geometry}
\usepackage{hyperref}
\usepackage{float}
\usepackage{graphicx}
\usepackage{pdfpages}
\usepackage{amsmath}
\usepackage{listings}
%\setlength{\parskip}{0.5em}
\setlength{\parindent}{0pt}

\begin{document}

\end{document}