Compilare: user.cpp: In function ‘void dijkstra(int, int)’: user.cpp:28:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < G[nod].size(); i++){ ^ user.cpp: In function ‘void drum(int, int, int)’: user.cpp:42:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[nod].size() ; i++){ ^ user.cpp: In function ‘int main()’: user.cpp:72:25: warning: ‘nod’ may be used uninitialized in this function [-Wmaybe-uninitialized] ok = 1; drum(nod,0,a); ^