#include <iostream>
#include <cstdlib>
#include <vector>
#include <iterator>  //for ostream_iterator and reverse_iterator template
#include <algorithm>
using namespace std;

int main()
{
	const int a[] = {10, 20, 30};
	const size_t n = sizeof a / sizeof a[0];
	vector<int> v(a, a + n);

	for (vector<int>::reverse_iterator it = v.rbegin();
		it != v.rend(); ++it) {
		cout << *it << "\n";
	}
	cout << "\n";

	copy(v.rbegin(), v.rend(), ostream_iterator<int>(cout, "\n"));
	cout << "\n";

	copy(reverse_iterator<const int *>(a + n),
	     reverse_iterator<const int *>(a),
		ostream_iterator<int>(cout, "\n"));

	return EXIT_SUCCESS;
}