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

int main() {
    list<int> l1 = {1, 2, 3, 4, 5};
//    cout << l1.front() << endl;
//    cout << l1.back() << endl;

    list<int>::iterator it = l1.end();
    it--;
    it--;
    cout << *it << endl;

    list<int>::iterator it2 = l1.begin();
    it2 = next(it2, 2);
    cout << *it2 << endl;
    return 0;
}