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

int main()
{
	list<int> li {10, 20, 30};

	for (auto i: li) {
		cout << i << "\n";
	}

	cout << "\n";

	for (list<int>::iterator it {li.begin()}; it != li.end(); ++it) {
		cout << *it << "\n";
	}

	return EXIT_SUCCESS;
}