@@ -0,0 +1,224 @@
+public boolean array220(int%5B%5D nums, int index) %7B%0A  if (index == nums.length) return false;%0A  if (index == 0) return array220(nums, 1); // Start at 1%0A  return nums%5Bindex%5D == nums%5Bindex-1%5D * 10 %7C%7C array220(nums, index + 1);%0A%7D%0A

Create array220.java