#include <iostream>
#include <vector>
#include <iterator>
using namespace std;

int main()
{
    vector<int> v = {10, 20, 30, 40, 50};
    vector<int>::iterator it;

    cout << "Test 1:";
    for (it = v.begin(); it != v.end(); it++)
    {
        cout << " " << *it;
    }
    cout << endl;

    cout << "Test 2:";
    for (it = v.begin(); it == v.end(); it++)
    {
        cout << " " << *it;
    }
    cout << endl;

    cout << "Test 3:";
    for (it = begin(v); it <= end(v); it++)
    {
        cout << " " << *it;
    }
    cout << endl;
};