\usepackage{algorithm}
\usepackage{algorithmic}
\usepackage{longtable}
+\usepackage{amsmath,mathtools}
+\usepackage[utf8]{inputenc}
% correct bad hyphenation here
\input{abstract}
\section{Introduction}\label{sec:intro}
-%\input{intro.tex}
+\input{intro.tex}
\section{Similarity-based Approach}