\begin{table}[]
\begin{tabular}{|l|l|l|l|l|l|l|}
\hline
\multicolumn{2}{|c|}{\textbf{ILP}} & \multicolumn{3}{c|}{\textbf{Greedy}} & \multicolumn{2}{c|}{\textbf{LS}} \\ \hline
Cost           & Runtime           & Cost      & Error      & Runtime     & Cost           & Error           \\ \hline
               &                   &           &            &             &                &                 \\ \hline
               &                   &           &            &             &                &                 \\ \hline
               &                   &           &            &             &                &                 \\ \hline
               &                   &           &            &             &                &                 \\ \hline
\end{tabular}
\end{table}