Compilare: user.cpp: In function ‘void topsort(int)’: user.cpp:13:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<graf[node].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:46:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<graf.size();i++) ^