What is the output of the following C++ program?#include #include using namespace std; int main() { vector v = {1, 2, 3}; v.push_back(4); v…

What is the output of the following C++ program?

#include <iostream>
#include <vector>
using namespace std;
int main() {
    vector<int> v = {1, 2, 3};
    v.push_back(4);
    v.erase(v.begin() + 1);
    cout << v.size() << v[1];
}