#include<iostream> 
using namespace std; 
#include<queue> 
 
template<class T> 
struct TreeNode //二叉树结点 
{ 
  T _value; 
  TreeNode<T>* _left; 
  TreeNode<T>* _right; 
  TreeNode(const T& value) 
    :_value(value) 
    , _left(NULL) 
    , _right(NULL) 
  {} 
}; 
 
 
template<class T> 
bool Is_completeTree(TreeNode<T>* node) 
{ 
  queue<TreeNode<T>*> q; 
  if (node != NULL) 
  { 
    q.push(node); 
    TreeNode<T>* cur = NULL; 
    bool flag = false; //设置标志位 
    while (!q.empty()) 
    { 
      cur = q.front(); 
      q.pop(); 
      if (cur) 
      { 
        if (flag) 
          return false; 
        q.push(cur->_left); 
        q.push(cur->_right); 
      } 
      else 
        flag = true; //修改标志位 
    } 
    return true; 
  } 
  return true; 
}