Сдвиг 3-й способ

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        int n;
        n = in.nextInt();
        int[] a = new int[n];
        for (int i = 0; i < n; i++) {
            a[i] = in.nextInt();
        }

        int r;
        r = in.nextInt();

        int k = 0, m = n-r-1;
        for (int i = 0; i < (m - k + 1) / 2; i++) {
            int t = a[k + i];
            a[k + i] = a[m - i];
            a[m - i] = t;
        }

        k = n-r; m = n-1;
        for (int i = 0; i < (m - k + 1) / 2; i++) {
            int t = a[k + i];
            a[k + i] = a[m - i];
            a[m - i] = t;
        }

        k = 0; m = n-1;
        for (int i = 0; i < (m - k + 1) / 2; i++) {
            int t = a[k + i];
            a[k + i] = a[m - i];
            a[m - i] = t;
        }

        for (int i = 0; i < n; i++) {
            System.out.print(a[i] + " ");
        }

    }
}