View Compilation Error

0_0_23202658_11049.cpp: In function 'int main()':
0_0_23202658_11049.cpp:52:2: error: missing template arguments before 'que'
  que;
  ^
0_0_23202658_11049.cpp:55:9: error: 'que' was not declared in this scope
         que.push(P(0,0,0));
         ^