Compilare: user.cpp: In function ‘void bellman()’: user.cpp:44:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<v[nod].size(); i++) ~^~~~~~~~~~~~~~ user.cpp: In function ‘int dijkstra()’: user.cpp:65:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<v[nod].size(); i++) ~^~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:99:12: warning: ‘cost’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<cost; ^