\documentclass{article}
\usepackage[utf8]{inputenc}
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\usepackage{forest}
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\title{forest -- pakietomat.wordpress.com}
\begin{document}
Przykłady użycia pakietu \textit{forest}. Pełny opis na stronie paczkomat.wordpress.com (http://pakietomat.wordpress.com)
\vspace{2cm}
\begin{forest}
[A
[B
[D]
[E]]
[C
[F]
[G]
[H
[I] ] ]
]
\end{forest}
\bigskip
\begin{forest}
[AAA, circle, draw [BBB, ellipse, draw] [CCC, rectangle, draw]]
\end{forest}
\bigskip
\begin{forest}
[A [B [D] [E]] [C [F] [G] ] ]
\end{forest}
\end{document}
