Compilare: user.cpp: In function ‘void Make_L()’: user.cpp:35:9: warning: unused variable ‘aux’ [-Wunused-variable] int aux = 0; ^ user.cpp: In function ‘void Eulerian()’: user.cpp:81:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Solution.size(); ++i) out << Solution[i] << ' '; ^