View Compilation Error

0_0_39418718_30521.cpp: In function 'void bfs()':
0_0_39418718_30521.cpp:16:26: error: invalid use of member 'std::priority_queue<_Tp, _Sequence, _Compare>::const_reference std::priority_queue<_Tp, _Sequence, _Compare>::top() const [with _Tp = int; _Sequence = std::vector<int>; _Compare = std::less<int>; const_reference = const int&]' (did you forget the '&' ?)
   16 |                 if(top>q.top)top=q.top();
      |                        ~~^~~