In file included from /in/driver/main.cpp:1:0:
/in/shortestP2P.hpp: In member function 'void ShortestP2P::readGraph()':
/in/shortestP2P.hpp:78:23: error: 'l' was not declared in this scope
           if (edge[i][l] != INF && edge[k][j] != INF) // Check if the paths i->j and j->k exist
                       ^