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

int main(){
    list<int> myList;

    myList.push_back(10);
    myList.push_back(20);
    myList.push_front(5);


    cout << "List elements: ";
    for (int x : myList){
        cout << x << " ";
    }
    cout << endl;

    return 0;
}