View Compilation Error

0_0_13589600_30997.cpp: In function 'int main()':
0_0_13589600_30997.cpp:20:3: error: 'priority_queue' was not declared in this scope
   priority_queue<node>q[5];
   ^
0_0_13589600_30997.cpp:20:3: note: suggested alternative:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:64:0,
                 from 0_0_13589600_30997.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_queue.h:370:11: note:   'std::priority_queue'
     class priority_queue
           ^
0_0_13589600_30997.cpp:20:22: error: expected primary-expression before '>' token
   priority_queue<node>q[5];
                      ^
0_0_13589600_30997.cpp:20:23: error: 'q' was not declared in this scope
   priority_queue<node>q[5];
                       ^