\begin{array}{c}
\begin{array}{c} \Qcircuit@C=1em @R=.7em{
& & \qout{A_{1}~\mbox{part}~1~\mbox{on}~\{N_{1 - 1} + 1~\ldotp \ldotp~N_{1}\}}
} \end{array} \\
\begin{array}{c} \Qcircuit@C=1em @R=.7em{
& & \qout{A_{1}~\mbox{part}~2~\mbox{on}~\{N_{1 - 1} + 1~\ldotp \ldotp~N_{1}\}}
} \end{array} \\
\vdots \\
\begin{array}{c} \Qcircuit@C=1em @R=.7em{
& & \qout{A_{1}~\mbox{part}~n_{1}~\mbox{on}~\{N_{1 - 1} + 1~\ldotp \ldotp~N_{1}\}}
} \end{array} \\
\begin{array}{c} \Qcircuit@C=1em @R=.7em{
& & \qout{A_{2}~\mbox{part}~1~\mbox{on}~\{N_{2 - 1} + 1~\ldotp \ldotp~N_{2}\}}
} \end{array} \\
\begin{array}{c} \Qcircuit@C=1em @R=.7em{
& & \qout{A_{2}~\mbox{part}~2~\mbox{on}~\{N_{2 - 1} + 1~\ldotp \ldotp~N_{2}\}}
} \end{array} \\
\vdots \\
\begin{array}{c} \Qcircuit@C=1em @R=.7em{
& & \qout{A_{2}~\mbox{part}~n_{2}~\mbox{on}~\{N_{2 - 1} + 1~\ldotp \ldotp~N_{2}\}}
} \end{array} \\
\begin{array}{c}\vdots\\ \vdots\end{array} \\
\begin{array}{c} \Qcircuit@C=1em @R=.7em{
& & \qout{A_{m}~\mbox{part}~1~\mbox{on}~\{N_{m - 1} + 1~\ldotp \ldotp~N_{m}\}}
} \end{array} \\
\begin{array}{c} \Qcircuit@C=1em @R=.7em{
& & \qout{A_{m}~\mbox{part}~2~\mbox{on}~\{N_{m - 1} + 1~\ldotp \ldotp~N_{m}\}}
} \end{array} \\
\vdots \\
\begin{array}{c} \Qcircuit@C=1em @R=.7em{
& & \qout{A_{m}~\mbox{part}~n_{m}~\mbox{on}~\{N_{m - 1} + 1~\ldotp \ldotp~N_{m}\}}
} \end{array} \\
\end{array}