How to Reverse Iterate a Vector in C++?

#include <bits/stdc++.h>
using namespace std;
int main() {
    vector<int> v = {1, 3, 4, 7, 9};
    // Iterating the vector in reverse order
    for (auto i = v.rbegin(); i != v.rend(); i++)
        cout << *i << " ";
  
    return 0;
}

#include <bits/stdc++.h>
using namespace std;
int main() {
    vector<int> v = {1, 3, 4, 7, 9};
    // Iterating vector in reverse order
    for (int i = v.size() - 1; i >= 0; i--)
        cout << v[i] << " ";
  
    return 0;
}

#include <bits/stdc++.h>
using namespace std;
int main() {
    vector<int> v = {1, 3, 4, 7, 9};
    // Iterating the vector in reverse order
    for (auto &i : vector<int>(v.rbegin(), v.rend()))
        cout << i << " ";
    return 0;
}

#include <bits/stdc++.h>
using namespace std;
int main() {
    vector<int> v = {1, 3, 4, 7, 9};
    // reverse the vector
    reverse(v.begin(), v.end());
    // Iterating through vector
    for (auto i : v)
        cout << i << " ";
    return 0;
}