LintCode Q112 Remove Duplicates from Sorted List in Python

  • Jinhai ZHOU
  • 3 Minutes
  • 2016年12月5日
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"""
Definition of ListNode
class ListNode(object):
def __init__(self, val, next=None):
self.val = val
self.next = next
"""
class Solution:
"""
@param head: A ListNode
@return: A ListNode
"""
def deleteDuplicates(self, head):
# write your code here
if head is None or head.next is None:
return head
current = head
runner = head.next
while runner:
if runner.val == current.val:
runner = runner.next
else:
current.next = runner
current = runner
runner = runner.next
if runner is not current:
current.next = None
return head
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