哪里错了啊？容器类问题！

寂寞男孩

deque<int> de(10,5);
deque<int>::iterator p = de.begin(),q = de.end();
list<int> li(p,q);



错误信息：
error C2664: '__thiscall std::list<int,class std::allocator<int> >::std::list<int,class std::allocator<int> >(unsigned int,const int &,const class std::allocator<int> &)' : cannot convert para
meter 1 from 'class std::deque<int,class std::allocator<int> >::iterator' to 'unsigned int'




？