Compilare: main.cpp: In member function 'void Dijkstra::djk(std::vector<std::vector<std::pair<long long int, long long int> > >&, long long int, long long int)': main.cpp:58:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i< g[act.first].size();i++) ~^~~~~~~~~~~~~~~~~~~~~ main.cpp:51:12: warning: unused variable 'flag_path' [-Wunused-variable] bool flag_path=0; ^~~~~~~~~