import java.util.Arrays;

public class ArrayBackTrack {

public static void main(String[] args) {

int[] arr = new int[5];

arrFill(arr, 0 , 1);

System.out.println(Arrays.toString(arr));

}

static void arrFill(int[] arr, int i, int val) {

// base condition

if (i == arr.length) {

System.out.println(Arrays.toString(arr));

return;

}

// recursive condition

arr[i] = val;

arrFill(arr, i+1, val+1);

arr[i] = val - 2 ;

}

}