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

#include <iostream>
#include <vector>
using namespace std;
int main ()
{
    vector<int> first;
    first.assign (7,100);
    vector<int>::iterator it;
    it=first.begin()+1;
    int myints[] = {1776,7,4};
    cout << int (first.size()) << '\n';
    return 0;
}