View Compilation Error

0_0_16573268_26961.cpp: In function 'void build_fail(int)':
0_0_16573268_26961.cpp:43:5: error: 'queue' was not declared in this scope
     queue<int>q;
     ^
0_0_16573268_26961.cpp:43:11: error: expected primary-expression before 'int'
     queue<int>q;
           ^
0_0_16573268_26961.cpp:45:5: error: 'q' was not declared in this scope
     q.push(p);
     ^