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

#include <iostream>
#include <vector>
using namespace std;
int main ()
{
    vector<int> myvector (3);
    for (unsigned i = 0; i < myvector.size(); i++)
    myvector.at(i) = i;
    for (unsigned i = 0; i < myvector.size(); i++)
    cout << ' ' << myvector.at(i);
    return 0;
}