Compilare: user.cpp: In function ‘void dfsi(int, int)’: user.cpp:22:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<v[p].size(); i++) ^ user.cpp: In function ‘void dfsf(int, int)’: user.cpp:31:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<v[p].size(); i++) ^