publicListNode reverseList(ListNode head) { ListNode newHead =null; while(head !=null) { ListNode next = head.next; head.next = newHead; newHead = head; head = next; } returnnewHead; } Java: Recursive solution 1 2 3 4 5 6 7 8 9 10 11 publicListNode reverseList(ListNode head) {...
/* recursive solution */ return reverseListInt(head, null); } private ListNode reverseListInt(ListNode head, ListNode newHead) { if (head == null) return newHead; ListNode next = head.next; head.next = newHead; return reverseListInt(next, head); }二、Reverse Linked List II问题描述:问...
# Definition for singly-linked list. # class ListNode: # def __init__(self, val=0, next=None): # self.val = val # self.next = next class Solution: def reverseList(self, head: ListNode) -> ListNode: curr = head prev = None while curr != None: next_temp = curr.next # need...
public class Solution { 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...
Time: O(n) as we have to traverse all the nodes in the linked list. Space: O(1) as we use a dummy node as the fake head of the reversed list. Recursive solution class Solution { public ListNode reverseList(ListNode head) {
//RecursiveclassSolution {public: ListNode* reverseList(ListNode*head) {if(!head || !head->next)returnhead; ListNode*p =head; head= reverseList(p->next); p->next->next =p; p->next =NULL;returnhead; } }; 本文转自博客园Grandyang的博客,原文链接:倒置链表[LeetCode] Reverse Linked List,...
Reverse a linked list 原创转载请注明出处:http://agilestyle.iteye.com/blog/2360694 Recursive Idea Reverse(Head -> Remaining List) => Reverse(Remaining List) -> Head Example: Reverse(1->2->3->4->5) ... 查看原文 Use stack (LIFO) to simulate queue (FIFO)...
You can see that links are reversed in each step using the pointer's previous and next. This is also known as the iterative algorithm to reverse the linked list in Java. For the recursive algorithm, you can also seeIntroduction to Algorithmsbook by Thomas H. Cormen. ...
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