Eroare de compilare: user.cpp: In function ‘void ref(int, int)’: user.cpp:24:40: error: reference to ‘next’ is ambiguous for (vector < int > :: iterator it=next[nod].begin();it!=next[nod].end();it++) ^ user.cpp:7:16: note: candidates are: std::vector<int> next [100009] vector < int > next[100009]; ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:66:0, from /usr/include/c++/4.8/vector:60, from user.cpp:2: /usr/include/c++/4.8/bits/stl_iterator_base_funcs.h:184:5: note: template<class _ForwardIterator> _ForwardIterator std::next(_ForwardIterator, typename std::iterator_traits<_Iter>::difference_type) next(_ForwardIterator __x, typename ^ user.cpp:24:62: error: reference to ‘next’ is ambiguous for (vector < int > :: iterator it=next[nod].begin();it!=next[nod].end();it++) ^ user.cpp:7:16: note: candidates are: std::vector<int> next [100009] vector < int > next[100009]; ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:66:0, from /usr/include/c++/4.8/vector:60, from user.cpp:2: /usr/include/c++/4.8/bits/stl_iterator_base_funcs.h:184:5: note: template<class _ForwardIterator> _ForwardIterator std::next(_ForwardIterator, typename std::iterator_traits<_Iter>::difference_type) next(_ForwardIterator __x, typename ^ user.cpp: In function ‘int main()’: user.cpp:64:54: error: reference to ‘next’ is ambiguous if (pozb[poz[a[i].nxt]] < pozb[i] &&a[i].nxt!=0) next[pozb[i]].push_back(pozb[poz[a[i].nxt]]); ^ user.cpp:7:16: note: candidates are: std::vector<int> next [100009] vector < int > next[100009]; ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:66:0, from /usr/include/c++/4.8/vector:60, from user.cpp:2: /usr/include/c++/4.8/bits/stl_iterator_base_funcs.h:184:5: note: template<class _ForwardIterator> _ForwardIterator std::next(_ForwardIterator, typename std::iterator_traits<_Iter>::difference_type) next(_ForwardIterator __x, typename ^ user.cpp:30:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("ttg.in", "r", stdin); ^ user.cpp:31:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("ttg.out", "w", stdout); ^ user.cpp:32:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &m); ^ user.cpp:33:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &n); ^