class Solution: def oddEvenList(self, head: Optional[ListNode]) -> Optional[ListNode]: if not head: return None odd = head # 链表的第一个节点,即奇数位的第一个节点 even = head.next # 链接表的第二个节点,即偶数位的第一个节点。如果链表只有两个元素,则不用进入下面的核心 while 循环 even_...
(1)先递归oddEvenList(head -> next -> next),链表此时为2->1->(递归结果:3->6->7->5->4)(2)把2插入到3(递归结果奇数位的第一个位置)前面,把1插入到5前面(递归结果偶数位的第一个位置)此法缺点,每次递归都要求当前链表长度,时间复杂度肯定超O(n)了,不推荐...
https://leetcode.com/problems/odd-even-linked-list/ 建两个dummy node,一个维护奇数节点构成的链表,另一个维护偶数节点构成的链表,最后再拼接起来。注意偶数节点构成的链表最后一个节点的next域要置空,否则可能会导致出现环路。 classSolution{public:ListNode*oddEvenList(ListNode* head){if(!head || !head-...
LeetCode 328. Odd Even Linked List 本题主要解决将一个链表中的偶数节点全放在奇数节点之后,并返回头结点。 本题比较简单,新建一个odd节点,指向下一个奇数节点,even节点指向偶数节点,用节点evenhead记录偶数节点的头,当所有循环完成时,将最后一个奇数节点的next指向evenhead。 代码如下:......
https://leetcode.com/problems/odd-even-linked-list/description/ 链表题就是考代码简洁和细心。。。 https://leetcode.com/problems/odd-even-linked-list/discuss/78078/Simple-C++-solution-O(n)-time-O(1)-space 这里有个很精巧的代码,注意...猜...
LeetCode-Odd Even Linked List Description: Given a singly linked list, group all odd nodes together followed by the even nodes. Please note here we are talking about the node number and not the value in the nodes. You should try to do it in place. The program should run in O(1) ...
Leetcode: Odd Even Linked List Given a singly linked list, group all odd nodes together followed by the even nodes. Please note here we are talking about the node number and not the value in the nodes. You shouldtrytodoit in place. The program should run in O(1) space complexity and...
Given a singly linked list, group all odd nodes together followed by the even nodes. Please note here we are talking about the node number and not the value in the nodes. You should try to do it in place. The program should run in O(1) space complexity and O(nodes) time complexity...
https://leetcode-cn.com/problems/odd-even-linked-list/ Given the head of a singly linked list, group all the nodes with odd indices together followed by the nodes with even indices, and return the reordered list. The first node is considered odd, and the second node is even, and so ...
力扣leetcode-cn.com/problems/odd-even-linked-list/ 题目描述 给定一个单链表,把所有的奇数节点和偶数节点分别排在一起。请注意,这里的奇数节点和偶数节点指的是节点编号的奇偶性,而不是节点的值的奇偶性。 请尝试使用原地算法完成。你的算法的空间复杂度应为 O(1),时间复杂度应为 O(nodes),nodes 为节...