\providecommand{\ntables}{7}\providecommand{\algatables}{\StrLeft{ LSfminbnd posik noiseless}{\ntables}}\providecommand{\algbtables}{\StrLeft{ LSstep posik noiseless}{\ntables}}
\begin{tabularx}{1.0\textwidth}{@{}c@{}|*{5}{@{}r@{}X@{}}|@{}r@{}@{}l@{}}
\#FEs/D & \multicolumn{2}{@{}c@{}}{0.5} & \multicolumn{2}{@{}c@{}}{1.2} & \multicolumn{2}{@{}c@{}}{3} & \multicolumn{2}{@{}c@{}}{10} & \multicolumn{2}{@{}c@{}}{50} & \multicolumn{2}{@{}l@{}}{\#succ}\\\hline
\textbf{f21} & \multicolumn{2}{@{}c@{}}{\textit{6.3e+1}:160 \quad} & \multicolumn{2}{@{}c@{}}{\textit{4.0e+1}:305 \quad} & \multicolumn{2}{@{}c@{}}{\textit{2.5e+1}:380 \quad} & \multicolumn{2}{@{}c@{}}{\textit{1.6e+1}:784 \quad} & \multicolumn{2}{@{}c@{}|}{\textit{6.3e+0}:2510 } & 30 & /30\\
\algatables\hspace*{\fill} & \textbf{3} & \textbf{.6}\mbox{\tiny (0.5)}$^{\star4}$ & \textbf{2} & \textbf{.3}\mbox{\tiny (0.6)}$^{\star4}$ & \textbf{2} & \textbf{.2}\mbox{\tiny (0.8)}$^{\star4}$ & \textbf{4} & \textbf{.7}\mbox{\tiny (9)}$^{\star3}$ & \textbf{6} & \textbf{.4}\mbox{\tiny (10)}$^{\star}$ & 15 & /15\\
\algbtables\hspace*{\fill} & 85 & \mbox{\tiny (16)} & 154 & \mbox{\tiny (501)} & 155 & \mbox{\tiny (404)} & 116 & \mbox{\tiny (159)} & 127 & \mbox{\tiny (120)} & 10 & /15
\end{tabularx}