%\input{DP1}
%\input{DP2}

\documentclass{article}
\usepackage{graphicx}
\usepackage{tikz}
\usepackage{xepersian}
\settextfont{Yas}
\setdigitfont{Yas}
\begin{document}
\begin{figure}[htbp]
\centering
\tikzstyle{input}=[circle,thick,minimum size=.5cm,draw=black!80,fill=white!20]


\begin{tikzpicture}[>=latex,text height=1.5ex,text depth=0.25ex]
  \matrix[row sep=.5cm,column sep=0.5cm] 
  {
  \node(1)[input]{$0$}; &\\
  & \node (2) [input] {$1$};\\
  };   
    \path[->]
    (1) edge (2)
    ;
\end{tikzpicture}
\caption{نمونه}
\end{figure}
\end{document}