There's code in one reply that spells it out, but you might find it easier to start from the bottom up, by asking and answering tiny questions (this is the approach in The Little Lisper): What is the reverse of null (the empty list)? null. What is the reverse of a one element l...
Program to reverse a linked list in java publicclassLinkedList{//head object of class node will point to the//head of the linked listNode head;//class node to create a node with data and//next node (pointing to node)publicstaticclassNode{intdata;Node next;Node(intdata,Node next){this.d...
* public class ListNode { * int val; * ListNode next; * ListNode(int x) { val = x; } * }*/classSolution {publicListNode reverseList(ListNode head) { ListNode curr=head; ListNode preNode=null;//反转后前节点ListNode nextTemp =null;//next nodewhile(curr !=null){ nextTemp= curr.next...
publicclassSolution{publicListNodeReverseList(ListNode head){if(head==null)returnnull;//head为当前节点,如果当前节点为空的话,那就什么也不做,直接返回null;ListNode pre=null;ListNode nextnode=null;while(head!=null){nextnode=head.next;head.next=pre;pre=head;head=nextnode;}returnpre;}} Reverse Lin...
ListNode prev = reverseList(n.next); prev.next = n; } return n; } } 迭代法 复杂度 时间O(N) 空间 O(1) 思路 基本迭代 代码 java public class Solution { public ListNode reverseList(ListNode head) { if(head == null || head.next == null) return head; ...
public ListNode reverseList(ListNode head) { ListNode prev = null; ListNode cur = head; while(cur!=null){ ListNode next = cur.next; cur.next = prev; prev = cur; cur = next; } return prev; } } recursive 解法: 总结是传给helper method两个节点,cur和pre(最开始是head和null), 先用n1...
def reverseList(self, head): """ :type head: ListNode :rtype: ListNode """ dummy = ListNode(None) while head: # 终止条件是head=Null nextnode = head.next # nextnode是head后面的节点 head.next = dummy # dummy.next是Null,所以这样head.next就成为了Null ...
How to reverse a Singly Linked List in Java https://www.youtube.com/playlist?list=PL6Zs6LgrJj3tDXv8a_elC6eT_4R5gfX4d 讲得比国内的老师清楚
leetcode-206 反转链表(ReverseLinkedList)-java 题目:反转链表反转一个单链表。 进阶:链表可以迭代或递归地反转。你能否两个都实现一遍?我这里用的是迭代的方式进行链表的反转边界值判断: head == null // 空链表,无需反转,返回...,初始值为null q // ListNode类型,当前节点的下一个节点,初始值为null 解题...
We will see how to reverse a linked list in java. LinkedList is a linear data structure where an element is a separate object with a data part and address part.