Rotate elements using C++

#include <bits/stdc++.h>

using namespace std;

int main() {
    int n;
    cin >> n;
    vector<int> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    int p = 4; // no. of adjacent elements to be rotated
    rotate(a.begin(), a.begin() + p, a.begin() + p + 1);
    for (int i = 0; i < n; i++) {
        cout << a[i] << " ";
    }
    cout << '\n';
    return 0;
}