Compilare: user.cpp: In function ‘void parcurgere(int)’: user.cpp:19:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<M[nod_cur].size();++i) ^ user.cpp: In function ‘int main()’: user.cpp:54:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0;j<MF[i].size();++j) ^