Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:17:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<g[v].size();i++) ^ user.cpp: In function ‘void dfs_(int)’: user.cpp:25:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<gt[v].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:53:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<Cp[cp].size();i++) V[Cp[cp][i]]=0; ^ user.cpp:55:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<g[nod1].size();i++) if (V[g[nod1][i]]==0) { nod2=g[nod1][i]; break; } ^ user.cpp:68:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0 ; i < sol.size();i++) cout << sol[i]<<' '; ^