import java.util.*;
public class test {
    public static void printArray(int[] a, int size) {
        if (size < 0)
        {
            System.out.println("Error");
            System.exit(0);
        }
        else if (size == 0)
        {
            System.out.println("1");
        }
        else if (size == 1)
        {
            System.out.println(a[size - 1]);
        }
        else
        {
            System.out.println(a[size - 1]);
            printArray(a, size - 1);
        }
    }

    public static void main(String[] args)
    {
        int a[] = {2, 4, 1, 6};
        int size = a.length;
        System.out.println (printArray(a, size-1)); //void type not allowed here

    }
}