Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:21:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<edges[vfc].size(); ++i){ ^ user.cpp: In function ‘void dfs_t(int)’: user.cpp:30:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<edges_t[vfc].size(); ++i){ ^ user.cpp: In function ‘int main()’: user.cpp:129:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<edges[i].size(); ++j){ ^ user.cpp: In function ‘void ciclu()’: user.cpp:115:45: warning: ‘inc’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<muchie[next][0]<<" "<<muchie[inc][0]<<"\n"; ^