public int matchUp(int[] nums1, int[] nums2) {
  int count = 0;
  for (int i = 0; i < nums1.length; i++) {
    int n1 = nums1[i];
    int n2 = nums2[i];
    int diff = Math.abs(n1 - n2);
    if (diff <= 2 && n1 != n2)
      count++;
  }
  return count;
}