Compilare: user.cpp: In function ‘int main()’: user.cpp:42:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(V[a].size()>Gr) {Gr=V[a].size(); nod=a;} ^ user.cpp:43:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(V[b].size()>Gr) {Gr=V[b].size(); nod=b;} ^ user.cpp:45:27: warning: ‘nod’ may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%d\n",BFS(nod)); ^