What are these c++ std functions in my gprof output which are taking quite a lot of time?

Gprof output. I have used deques, vector and std:: move in my code.

Flat profile:

Each sample counts as 0.01 seconds.
  %   cumulative   self              self     total           
 time   seconds   seconds    calls   s/call   s/call  name    
 10.70      0.78     0.78 411724776     0.00     0.00  __gnu_cxx::__normal_iterator<int*, std::vector<int, std::allocator<int> > >::operator*() const
  5.97      1.22     0.44 114087996     0.00     0.00  __gnu_cxx::__normal_iterator<int*, std::vector<int, std::allocator<int> > >::operator--()
  5.90      1.65     0.43 256602502     0.00     0.00  __gnu_cxx::__normal_iterator<int*, std::vector<int, std::allocator<int> > >::base() const
  5.90      2.08     0.43 197352626     0.00     0.00  std::remove_reference<int&>::type&& std::move<int&>(int&)
  5.76      2.50     0.42    20556     0.00     0.00  void std::__move_merge_adaptive<int*, __gnu_cxx::__normal_iterator<int*, std::vector<int, std::allocator<int> > >, __gnu_cxx::__normal_iterator<int*, std::vector<int, std::allocator<int> > >, __gnu_cxx::__ops::_Iter_less_iter>(int*, int*, __gnu_cxx::__normal_iterator<int*, std::vector<int, std::allocator<int> > >, __gnu_cxx::__normal_iterator<int*, std::vector<int, std::allocator<int> > >, __gnu_cxx::__normal_iterator<int*, std::vector<int, std::allocator<int> > >, __gnu_cxx::__ops::_Iter_less_iter)
  5.49      2.90     0.40 139505351     0.00     0.00  __gnu_cxx::__normal_iterator<int*, std::vector<int, std::allocator<int> > >::operator++()