\begin{table}[]
\begin{tabular}{|l|l|l|l|}
\hline
grupa & Dijkstra & A* & Bi A* \\ \hline
 20x20 & 0.00077 & 0.00037 & 0.00067 \\ \hline
 50x50 & 0.00555 & 0.00256 & 0.00345 \\ \hline
 100x100 & 0.02639 & 0.01113 & 0.01185 \\ \hline
 150x150 & 0.06611 & 0.02867 & 0.02927 \\ \hline
 250x250 & 0.19547 & 0.07807 & 0.08526 \\ \hline
 500x500 & 1.5304 & 0.76586 & 0.63301 \\ \hline
\end{tabular}
\end{table}