#include<vector>
#include<iostream>
using namespace std;
int main() {
    vector<int> myvector(3, 100);
    vector<int>::iterator it;

    it = myvector.end();
    it = myvector.insert(it, 200);

    myvector.insert(it, 2, 300);
    it = myvector.end(); ////////// here is the point what i want to ask. ///////////

    std::vector<int> anothervector(2, 400);
    myvector.insert(it - 2, anothervector.begin(), anothervector.end());

    int myarray[] = { 501,502,503 };
    myvector.insert(myvector.begin(), myarray, myarray + 3);

    cout << "myvector contains:";
    for (it = myvector.begin(); it < myvector.end(); it++)
        cout << ' ' << *it;
    cout << 'n';

    return 0;

}

it = myvector.end();