LeetCode_83.删除排序链表中的重复元素

//C#
ListNode s = head;        
while (s!=null&&s.next!=null)        
{            
	if(s.val == s.next.val) s.next = s.next.next;            
	else s = s.next;        
	}        
return head;

---

#Python 3
s = head        
while s and s.next:            
	if s.val == s.next.val:s.next = s.next.next            
	else:s = s.next        
	return head