[Tex/LaTex] Line numbers are outside the box in algorithm2e

algorithm2eformatting

Here is my code:

\documentclass[11pt]{llncs}
\usepackage[utf8]{inputenc}
\usepackage{parskip}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{dsfont}
\usepackage{float}
\usepackage{multicol}
\usepackage{fixltx2e}
\usepackage{multicol}
\newcommand\blfootnote[1]{%
  \begingroup
  \renewcommand\thefootnote{}\footnote{#1}%
  \addtocounter{footnote}{-1}%
  \endgroup
  }

\usepackage[T1]{fontenc}
\usepackage{comment} 
\usepackage{amsmath}                                    % 
\setcounter{MaxMatrixCols}{20}
\usepackage[margin=1in]{geometry}
\usepackage[noend, boxruled, linesnumbered]{algorithm2e}
\usepackage{xcolor}
\usepackage{setspace}
\usepackage{hyperref}
\definecolor{bl}{rgb}{0.0,0.2,0.6} 
\definecolor{dark-red}{rgb}{0.4,0.15,0.15}
\definecolor{dark-blue}{rgb}{0.15,0.15,0.4}
\definecolor{medium-blue}{rgb}{0,0,0.5}
\usepackage{sectsty}
\hypersetup{
    colorlinks, linkcolor={dark-red},
    citecolor={dark-blue}, urlcolor={medium-blue}
}
\usepackage{graphicx}
\usepackage[compact]{titlesec} 
\newtheorem{observation}{\textsc{Observation}}
%%% Start of the document
\begin{document}
\begin{algorithm}[H]
\label{alg:seed}
    \SetAlgoLined
     \SetKwInOut{Input}{input}
    \Input{\textsc{Graph} $G$}
    line number outside the box\;
    another line\;
    a third line\;
    what is going on?\;
    \caption{\textsc{Caption}}
\end{algorithm}
\end{document}

And here is the output:
enter image description here

Which command sends line numbers outside of the box?

Best Answer

You can use algorithm2e and parskip in the same document if you load algorithm2e first:

\usepackage[noend, boxruled, linesnumbered] {algorithm2e}
\usepackage{parskip}

enter image description here

Code:

\documentclass[11pt]{llncs}
\usepackage[utf8]{inputenc}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{dsfont}
\usepackage{float}
\usepackage{multicol}
\usepackage{fixltx2e}
\usepackage{multicol}
\newcommand\blfootnote[1]{%
  \begingroup
  \renewcommand\thefootnote{}\footnote{#1}%
  \addtocounter{footnote}{-1}%
  \endgroup
  }

\usepackage[T1]{fontenc}
\usepackage{comment} 
\usepackage{amsmath}
\setcounter{MaxMatrixCols}{20}
\usepackage[margin=1in]{geometry}
%
\usepackage[noend, boxruled, linesnumbered] {algorithm2e}
\usepackage{parskip}
%
\usepackage{xcolor}
\usepackage{setspace}
\usepackage{hyperref}
\definecolor{bl}{rgb}{0.0,0.2,0.6} 
\definecolor{dark-red}{rgb}{0.4,0.15,0.15}
\definecolor{dark-blue}{rgb}{0.15,0.15,0.4}
\definecolor{medium-blue}{rgb}{0,0,0.5}
\usepackage{sectsty}
\hypersetup{colorlinks, linkcolor={dark-red},
citecolor={dark-blue}, urlcolor={medium-blue}}
\usepackage{graphicx}
\usepackage[compact]{titlesec} 
\newtheorem{observation}{\textsc{Observation}}

\usepackage{blindtext}% dummy text
% Start of the document
\begin{document}
\begin{algorithm}[H]
\label{alg:seed}
    \SetAlgoLined
    \SetKwInOut{Input}{input}
    \Input{\textsc{Graph} $G$}
    line number outside the box\;
    another line\;
    a third line\;
    what is going on?\;
    \caption{\textsc{Caption}}
    return
\end{algorithm}
\blindtext

\blindtext
\end{document}
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