View Compilation Error

0_0_34590266_21274.cpp: In function 'int main()':
0_0_34590266_21274.cpp:16:9: error: 'priority_Queue' was not declared in this scope
         priority_Queue<P,vector<P>,greater<P>> Q;
         ^
0_0_34590266_21274.cpp:16:25: error: expected primary-expression before ',' token
         priority_Queue<P,vector<P>,greater<P>> Q;
                         ^
0_0_34590266_21274.cpp:16:35: error: expected primary-expression before ',' token
         priority_Queue<P,vector<P>,greater<P>> Q;
                                   ^
0_0_34590266_21274.cpp:16:45: error: expected primary-expression before '>' token
         priority_Queue<P,vector<P>,greater<P>> Q;
                                             ^
0_0_34590266_21274.cpp:16:48: error: 'Q' was not declared in this scope
         priority_Queue<P,vector<P>,greater<P>> Q;
                                                ^