#include <vector> // vector used here but other containers would also have sufficed

#include <iostream>

using namespace std;



void main()

{

	vector<char> v(10);

	

	vector<char>::difference_type v_diff; // use difference_type for storing no of places between iterators

	vector<char>::iterator v_iter; // use iterator type for declaring iterators into a container

	// fill v with 10 char values

	for (v_iter = v.begin(); v_iter != v.end(); v_iter++)

	{	v_diff = v_iter - v.begin();

		*v_iter = v_diff + 'a';

	}

	vector<char>::size_type v_size = v_diff; // size_type variable can be assigned non-negative difference_type value

	

	vector<char> v2(v_size);

	vector<char>::const_iterator vc_iter; // use constant iterators to iterate with read-only access

	vector<char>::reverse_iterator vr_iter; // use reverse_iterator to iterate with reversed increment/decrement semantics

	// fill v2 with reversed copy of elements in v. Function rbegin and rend return iterators to the beginning

	// and end, respectively, of the reversed sequence, i.e. the end and beginning of the non-reversed sequence !

	for (vr_iter = v2.rbegin(), vc_iter = v.begin(); vr_iter != v2.rend(); vr_iter++, vc_iter++)

	{	*vr_iter = *vc_iter;	}

	for (v_iter = v2.begin(), vr_iter = v.rbegin()+1; v_iter != v2.end(); v_iter++, vr_iter++) 

	{	cout << *v_iter << " " << *vr_iter << " ";	}	// print contents of v and v2

}