omizi.cpp: In function 'void dfs(int)': omizi.cpp:22: warning: 'auto' will change meaning in C++0x; please remove it omizi.cpp:22: error: ISO C++ forbids declaration of 'it' with no type omizi.cpp:22: error: cannot convert 'std::_Rb_tree_const_iterator<str>' to 'int' in initialization omizi.cpp:23: error: no match for 'operator!=' in 'it != fii[nod].std::set<_Key, _Compare, _Alloc>::end [with _Key = str, _Compare = std::less<str>, _Alloc = std::allocator<str>]()' omizi.cpp:24: error: invalid type argument of 'unary *'