\begin{tabular}{|ccc||c|c|c|c|c|c|} \hline
\multicolumn{3}{|c||}{Specifications} & \multirow{2}{*}{success fr \% } & \multirow{2}{*}{success ALM \%} & \multirow{2}{*}{Time fr (s)} &\multirow{2}{*}{Time ALM (s)} &\multirow{2}{*}{Rank} &\multirow{2}{*}{Res (\%$L$)}\cr\cline{1-3}
  $m$ &   $n$ & mean($p$) &        &         &         &         &       &  \cr\hline
  600 &   600 &  0.22 &  90.00 &    0.00 &   25.62 &     NaN &     3 &    0.00  \cr\hline
 1000 &  1000 &  0.22 &  80.00 &    0.00 &   18.16 &     NaN &     3 &    0.00  \cr\hline
 1000 &  1000 &  0.33 &  85.00 &    0.00 &   23.81 &     NaN &     3 &    0.00  \cr\hline
 1000 &  1000 &  0.45 & 100.00 &  100.00 &   11.73 &   76.22 &     3 &    0.00  \cr\hline
 2000 &  2000 &  0.26 & 90.00 &    0.00 &   41.83   &     NaN &    3 &    0.00  \cr\hline
2000 &  2000 &  0.36 & 100.00 &  100.00 &    36.74  &  673.05 &    3 &    0.00  \cr\hline
\end{tabular}
