I have such preamble and the code.
\documentclass[a4paper,14pt ]{report}
\usepackage[T2A]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[russian,english]{babel}
\usepackage{amssymb,amsfonts,amsmath,mathtext,cite,enumerate,float}
\usepackage{graphicx}
\usepackage[14pt]{extsizes}
\usepackage{times}
\usepackage{hyperref}
\usepackage{tikz}
\usepackage[labelsep=period]{caption}
\usepackage{parallel,enumitem}
\DeclareCaptionLabelSeparator{par}{\par}
\captionsetup{labelsep=par,justification=centering}
\graphicspath{{images/}}
\newcommand\tablecaption[1]{
\captionsetup{labelsep=par,justification=centering}
\caption{#1}
}
\renewcommand{\baselinestretch}{1.5}\normalsize
\makeatletter
\renewcommand{\@biblabel}[1]{#1.}
\makeatother
\usepackage{geometry}
\geometry{left=3cm}
\geometry{right=1cm}
\geometry{top=2cm}
\geometry{bottom=2cm}
\renewcommand{\theenumi}{\arabic{enumi}}
\renewcommand{\labelenumi}{\arabic{enumi}}
\renewcommand{\theenumii}{.\arabic{enumii}}
\renewcommand{\labelenumii}{\arabic{enumi}.\arabic{enumii}.}
\renewcommand{\theenumiii}{.\arabic{enumiii}}
\renewcommand{\labelenumiii}{\arabic{enumi}.\arabic{enumii}.\arabic{enumiii}.}
\renewcommand{\rmdefault}{ftm}
\begin{document}
\begin{Parallel}{0.40\textwidth}{0.65\textwidth}
\ParallelLText{\noindent
\begin{enumerate}[itemsep=1ex]
\item{Vertices are sorted in the following order 0,5,1,2,4,3}
\item{Depth 1: \textbf{0},5,1,2,4,3} \\
Depth 2: \textbf{1},2 \\
Depth 3: \textbf{2} \\
Depth 2: 1,\textbf{2}
\item{Depth 1: 0,\textbf{5},1,2,4,3} \\
Depth 2: \textbf{4},3 \\
\item{Depth 1: 0,5,\textbf{1},2,4,3} \\
Depth 2: \textbf{2},3,4 \\
Depth 3: \textbf{3},4 \\
Depth 4: \textbf{4} \\
Depth 3: 3,\textbf{4} \\
Depth 2: 2,3,\textbf{4} \\
\item{Depth 1: 0,5,1,\textbf{2},4,3}
\end{enumerate}
}
\ParallelRText{\noindent
\\\\ (the bold face node is expanded)
\\\\
Cannot expand, so $CBC$ is \{0,1,2\} with size 3 \\
$d + (m - i)= 2 + (2 - 2) = 2 < 3,$ so we prune \\\\
$2 + (2-1)=3 \le CBC$, so we prune
\\\\ \\\\
becomes our new $CBC$ with size 4 \\
$3 + (2 - 2) = 3 < 4$, so we prune \\
$2 + (3 - 2) = 3 < CBC$, so we prune \\\\
$1 + (6 - 4) = 3 < CBC$, as depth = 1, we stop
}
\ParallelPar
\end{Parallel}
\end{document}
I have compiled it and have a good result, but when I have added it to the document with such preambula the border has changed.

How can I do it as it shown at the picture:



hyperrefpackage and everything looks as in your second image. – Thorsten Apr 27 '12 at 16:27