Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:25:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<V[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:61:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<C.size();i++) ^ user.cpp:66:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0;j<V[now].size();j++) ^