203 remove linked list elements
203. Remove Linked List Elements
题目: https://leetcode.com/problems/remove-linked-list-elements/
难度:
Easy
AC代码如下:
class Solution(object):
    def removeElements(self, head, val):
        """
        :type head: ListNode
        :type val: int
        :rtype: ListNode
        """
        dummy = ListNode(-1)
        dummy.next = head
        cur = dummy
        while cur.next:
            if cur.next.val == val:
                cur.next = cur.next.next
            else:
                cur = cur.next
        return dummy.next

