View Compilation Error

0_0_17230105_26463.cpp: In function 'int main()':
0_0_17230105_26463.cpp:40:18: error: no match for 'operator[]' (operand types are 'std::priority_queue<int>' and 'int')
                 q[qed]=i;
                  ^
0_0_17230105_26463.cpp:46:22: error: no match for 'operator[]' (operand types are 'std::priority_queue<int>' and 'int')
             int a = q[i];
                      ^
0_0_17230105_26463.cpp:50:22: error: no match for 'operator[]' (operand types are 'std::priority_queue<int>' and 'int')
                     q[qed] = edg[ep].b;
                      ^