Compilare: user.cpp: In function ‘void Write()’: user.cpp:49:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i <= sol.size(); i++ ) ^ user.cpp:52:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int j = 0; j <= sol[i].size(); j++ ) ^ user.cpp: In function ‘void Trajan(int)’: user.cpp:62:23: warning: unused variable ‘vecin’ [-Wunused-variable] for ( const auto& vecin : G[k] ) ^