Compilare: user.cpp: In function ‘void BFS(int)’: user.cpp:32:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<drum[node].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:66:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<drum[n].size();i++) if (vizit[drum[n][i]]==1) ^ user.cpp:58:5: warning: unused variable ‘aux’ [-Wunused-variable] int aux; ^