\documentclass[border=4pt]{standalone}
\usepackage{tikz}
\usetikzlibrary{matrix,positioning,arrows}
% tex.stackexchange.com/questions/22687/multirow-in-tikz-matrix
\tikzset{
table nodes/.style={
draw,
align=center,
minimum height=7mm,
minimum width =7mm,
text depth=0.5ex,
text height=2ex
},
table/.style={
matrix of nodes,
row sep=-\pgflinewidth,
column sep=-\pgflinewidth,
nodes={
table nodes
},
nodes in empty cells
}
}
\begin{document}
\begin{tikzpicture}
\matrix[table] (A)
{ |[draw=none]|
&a&b&c&d&e&f&g&h&i\\
maxC&5&4&5&5&5&4&2&5&4\\
maxC& & & & & & & & & \\
};
\matrix[table,below=of A-3-2] (B) {c\\g\\};
\matrix[table,below=of A-3-6] (C) {b\\e\\f\\i\\};
\matrix[table,below=of A-3-8] (D) {a\\c\\d\\e\\};
\foreach \s/\t in {8/B,3/C,7/C,10/C,2/D,4/D,5/D,6/D,9/D}
\draw[-stealth',shorten >=3pt,shorten <=3pt] (A-3-\s.south) -- (\t-1-1.north);
\end{tikzpicture}
\end{document}