View Compilation Error

0_0_35713294_8539.cpp: In function 'int main()':
0_0_35713294_8539.cpp:33:17: error: request for member 'x' in 'q.std::priority_queue<_Tp, _Sequence, _Compare>::top<int, std::vector<int>, std::less<int> >()', which is of non-class type 'const value_type {aka const int}'
    tim+=q.top().x;
                 ^