X92646 - Rotate vector

#include <iostream>
#include <vector>
using namespace std;

vector<int> read_vector(int n) {
     vector<int> v(n);
     for (int i = 0; i < n; ++i)
         cin >> v[i];
     return v;
}

void swap(int& x, int& y) {
    int z = x;
    x = y;
    y = z;
}

void reverse(vector<int>& v, int from, int to) {
    for (int i = from; i <= to; ++i){
        swap(v[i], v[to]);
        --to;
    }
}

void rotate_right(vector<int>& v, int k) {
    reverse (v, 0, v.size() - 1);
    reverse (v, 0, k - 1);
    reverse (v, k, v.size() - 1);
}

void write_vector(const vector<int>& v) {
    cout << v[0];
    for (int i = 1; i < v.size(); ++i){
        cout << ' ' << v[i];
    }
}

int main() {
    int n;
    cin >> n;
    vector<int> v = read_vector(n);
    int k;
    cin >> k;
    rotate_right(v, k);
    write_vector(v);
    cout << endl;
}