message: Update merge-k-sorted-lists.py
diff: @@ -35,12 +35,11 @@ class Solution(object):
  return None
  left, right = 0, len(lists) - 1
  while right > 0:
  - if left >= right:
  - left = 0
  - else:
  lists[left] = mergeTwoLists(lists[left], lists[right])
  left += 1
  right -= 1
  + if left >= right:
  + left = 0
  return lists[0]
  