Compilare: user.cpp: In function ‘void dfs1(int)’: user.cpp:14:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[nod].size();++i) ^ user.cpp: In function ‘void dfs2(int)’: user.cpp:29:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[T[nod]].size();++i) ^ user.cpp:38:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[nod].size();++i) ^ user.cpp: In function ‘int main()’: user.cpp:61:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[0].size();++i) ^