Compilare: user.cpp: In function ‘int main()’: user.cpp:77:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < vec.size(); ++i) ^ user.cpp:75:28: warning: ‘j_max’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<i_max+1<<" "<<j_max+1<<"\n"; ^ user.cpp:75:14: warning: ‘i_max’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<i_max+1<<" "<<j_max+1<<"\n"; ^