That is source code for DijKstra Algo

dijkstra algorithm is a algo used for routing purposes, Dijkstra is ver-2 common algorithm.. so enjoy code

Dijkstra s algorithm is an algorithm for finding the shortest paths between nodes in a graph, which may represent, for example, road networks. It was conceived by computer scientist Edsger W. Dijkstra in 1956 and published three years later.[1][2]