Compilare: user.cpp: In function ‘void dfss(int)’: user.cpp:27:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<v[nod].size();++i) ^ user.cpp: In function ‘void dfsv(int)’: user.cpp:37:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<v[nod].size();++i) ^ user.cpp: In function ‘void dfsw(int)’: user.cpp:48:36: 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:88:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<p.size();++i) ^