What will be the output of the following C++ code?

#include <iostream>
#include <iterator>
#include <vector>
using namespace std;
int main () 
{
    vector<int> myvector;
    for (int i = 0; i < 10; i++) 
        myvector.push_back(i);
    typedef vector<int> :: iterator iter_int;
    reverse_iterator<iter_int> rev_iterator;
    rev_iterator = myvector.rend() - 4;
    cout << *rev_iterator << endl;
    return 0;
}