View Compilation Error

0_0_29506089_22038.cpp: In function 'int BFS(int, int)':
0_0_29506089_22038.cpp:14:2: error: 'queue' was not declared in this scope
  queue<node>Q;
  ^
0_0_29506089_22038.cpp:14:2: note: suggested alternative:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:64:0,
                 from 0_0_29506089_22038.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_queue.h:96:11: note:   'std::queue'
     class queue
           ^
0_0_29506089_22038.cpp:14:12: error: expected primary-expression before '>' token
  queue<node>Q;
            ^
0_0_29506089_22038.cpp:14:13: error: 'Q' was not declared in this scope
  queue<node>Q;
             ^