publicListNode reverseBetween(ListNode head,intm,intn) {if(head ==null)returnnull; ListNode dummy=newListNode(0);//create a dummy node to mark the head of this listdummy.next =head; ListNode pre= dummy;//make a pointer pre as a marker for the node before reversingfor(inti = 0; i<m...
1 #include <iostream> 2 #include <malloc.h> 3 using namespace std; 4 5 struct ListNode { 6 int val; 7 ListNode *next; 8 ListNode(int x) : val(x), next(NULL) {} 9 }; 10 /*在链表的末端插入新的节点,建立链表*/ 11 ListNode *CreateList(int n) 12 { 13 ListNode *head; 14 L...
(参考视频讲解:Leetcode力扣|206反转链表|递归|reverse linked list_哔哩哔哩_bilibili) # 定义一个链表节点类classListNode:def__init__(self,val=0,next=None):# 初始化函数self.val=val# 节点的值self.next=next# 指向下一个节点的指针# 将给出的数组转换为链表deflinkedlist(list):head=ListNode(list[0]...
def reverseList(self, head: ListNode) -> ListNode: """ 递归法,时间O(n), 空间O(n) :param head: :return: """ # 递归终止条件 if head is None or head.next is None: return head # 每次将head节点的next部分反转,p为最后一个节点,也是反转后的第一个节点 p = self.reverseList(head.next)...
LeetCode反转链表 Reverse a singly linked list. Example: Input: 1->2->3->4->5->NULL Output: 5->4->3->2->1->NULL Method: 1、迭代法(Iterative) 分析:其实就是对一个单向链表进行反向遍历的过程。即:改变当前节点的next指针,指向它的前一个节点。
}; Python: class Solution(object): def reverseList(self, head): if(head == None or head.next == None): return head newHead = self.reverseList(head.next) head.next.next = head head.next = None return newHead分享至 投诉或建议评论...
Reverse a singly linked list. click to show more hints. Hint: A linked list can be reversed either iteratively or recursively. Could you implement both? 既然问了能否iteratively or recursively, 那就both把. iterative 解法: 总结就是得到下一个节点,更改当前节点指向,将指针往下移动,直到过完整个linked...
* Definition for singly-linked list. * public class ListNode { * int val; * ListNode next; * ListNode(int x) { val = x; } * } */classSolution{publicListNodereverseList(ListNode head){//1.基本问题的解if(head==null||head.next==null){returnhead;}//2.将大问题分解成小问题ListNode re...
x=123y='a string'print(x,y)x,y=y,xprint(x,y)输出结果:123astringastring123 递归实现 Java实现 Java实现逻辑上与C++无区别 1、迭代实现 Java 反转链表(Reverse Linked List) JAVA 迭代实现 2、递归实现 Java 反转链表(Reverse Linked List) JAVA 递归实现 ...
publicclassSolution{publicListNodereverseBetween(ListNode head,int m,int n){if(m==n||head==null||head.next==null){returnhead;}ListNode pre=newListNode(0);pre.next=head;ListNode Mpre=pre;ListNode NodeM=head;ListNode NodeN=head;int mNum=1;int nNum=1;while(mNum<m&&NodeM!=null){Mpre=...