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




list<int>    L, l2, l3;


///////////////////////////////////////////////////
int  main()
{

    int sum = 0;

    for (int i = 0; i < 10; i++)    L .push_back(i + 100);
    for (int i = 0; i < 30; i++)    l2.push_back(i);
    for (int i = 0; i <  5; i++)    l3.push_back(i);

    list<int>::iterator it;

    it = L.begin();

    sum = *it;

    it++;

    cout << "sum = " << sum << endl;

    cout << "Size of L = " << L.size() << endl;
}