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

int main()
{
	int a[] = {10, 30, 20};
	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";

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

	sort(v.rbegin(), v.rend());
	copy(v.begin(), v.end(), os);

	return EXIT_SUCCESS;
}