Compilare: user.cpp: In function ‘void DFS(long int)’: user.cpp:13:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (long i=0;i<graf[x].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:48:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (long i=0;i<Array.size();i++) ^