Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:13:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<g[nod].size(); ++i) ^ user.cpp: In function ‘void dfs2(int)’: user.cpp:25:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<gt[nod].size(); ++i) ^ user.cpp: In function ‘int main()’: user.cpp:55:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<comp[i].size(); ++j) cout<<comp[i][j]<<" "; ^