# Definitionforsingly-linked list.classListNode(object):def__init__(self):self.val=None self.next=None 2.对链表进行操作 代码语言:javascript 代码运行次数:0 运行 AI代码解释 classListNode_handle:def__init__(self):self.cur_node=None
沿着head一个个摸下去,且实时记录前方的node,摸到对应的item后链接该node的前后两个nodes 如果remove的那个node正好是head,则直接把head权给予接下去的那个node classUnorderList:def__init__(self): self.head =Nonedefis_empty(self):returnself.head ==Nonedefadd(self, item): temp = Node(item)#创建新...
self.head=new_node defadd_at_tail(self,val):new_node=ListNode(val)ifself.is_empty():self.head=new_nodeelse:current=self.headwhilecurrent.next:current=current.next current.next=new_node defadd_after_node(self,node,val):ifnot node:returnnew_node=ListNode(val)new_node.next=node.next node....
Remove an existing node from the linked list. """ prev = node.prev next = node.next prev.next = next next.prev = prev def _add_node_to_head(self, node): """ Add a new node right after dummy head. """ node.prev = self.dummy_head node.next = self.dummy_head.next self.dummy...
1definit(self, iterable=()):2#Note: use empty tuple rather than list to init iterable3ifnotiterable:4return5self.header = Node(iterable[0])#header value6node =self.header7foriiniterable[1:]:#add all node8node.next =Node(i)9node = node.next ...
We are given a linked list withheadas the first node. Let’s number the nodes in the list:node_1, node_2, node_3, ...etc. Each node may have a next larger value: fornode_i,next_larger(node_i)is thenode_j.valsuch thatj > i,node_j.val > node_i.val, andjis the smallest...
head add_node = Node(val) # 找到第 index 个节点的前驱节点 for _ in range(index): p = p.next add_node.next = p.next p.next = add_node # 插入节点,链表长度 +1 self.length += 1 def deleteAtIndex(self, index: int) -> None: """ Delete the index-th node in the linked list...
def addFirst(self, item): new_node = ListNode(item) new_node.next = self.head self.head = new_node self.counter += 1 def addLast(self, item): new_node = ListNode(item) self.counter += 1 if not self.head: self.head = new_node ...
class LinkedStack: """ 单向链表实现栈ADT """ class _Node: """ 存储单个链表节点的轻量级,私有类 """ __slots__ = '_element', '_next_' def __init__(self, element, next): self._element = element self._next = next def __init__(self): ...
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