Compilare: user.cpp: In function ‘void dijkstra_in_action()’: user.cpp:35:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<Graf[1].size();++i) d[Graf[1][i].first]=Graf[1][i].second; ^ user.cpp:46:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<Graf[poz].size();++i) ^ user.cpp:45:18: warning: ‘marcate’ may be used uninitialized in this function [-Wmaybe-uninitialized] ++marcate; ^