#include <iostream>
#include <cstdlib>
#include <list>
using namespace std;

int main()
{
	const int a[] = {10, 20, 30};
	const size_t n = sizeof a / sizeof a[0];
	list<int> li(a, a + n);
	list<int>::iterator it = li.begin();

	cout << "The first element of the list is " << *it << ".\n";
	li.erase(it);
	++it;
	cout << "The second element of the list is " << *it << ".\n";

	return EXIT_SUCCESS;
}