View Compilation Error

0_0_35926824_3524.cpp: In function 'int main()':
0_0_35926824_3524.cpp:24:10: error: converting to 'std::priority_queue<node>' from initializer list would use explicit constructor 'std::priority_queue<_Tp, _Sequence, _Compare>::priority_queue(const _Compare&, _Sequence&&) [with _Tp = node; _Sequence = std::vector<node, std::allocator<node> >; _Compare = std::less<node>]'
         q={};
          ^