leetcode——203. 移除链表元素

别人的做法，，，，

# Definition for singly-linked list.
# class ListNode:
#     def __init__(self, x):
#         self.val = x
#         self.next = None

class Solution:
    def removeElements(self, head: ListNode, val: int) -> ListNode:
        dummy = ListNode(0)
        dummy.next = head
        prev = dummy
        last = prev.next
        while last :
            if last.val == val:
                prev.next = last.next
                last = prev.next
            else:
                prev = prev.next
                last = prev.next
        return dummy.next

执行用时 :108 ms, 在所有 python3 提交中击败了27.51%的用户

内存消耗 :16.9 MB, 在所有 python3 提交中击败了12.81%的用户