Swap Nodes in Pairs Given a linked list, swap every two adjacent nodes and return its head. For example, Given1->2->3->4, you should return the list as2->1->4->3. Your algorithm should use only constant space.
LeetCode-Swap Nodes in Pairs Description: Given a linked list, swap every two adjacent nodes and return its head. You may not modify the values in the list’s nodes, only nodes itself may be changed. Example: AI检测代码解析 Given 1->2->3->4, you should return the list as 2->1->...
给你一个链表,两两交换其中相邻的节点,并返回交换后链表的头节点。你必须在不修改节点内部的值的情况下完成本题(即,只能进行节点交换)。 示例 1: 输入:head = [1,2,3,4] 输出:[2,1,4,3] 示例 2: 输入:head = [] 输出:[] 示例 3: 输入:head
代码如下: 1/**2* Definition for singly-linked list.3* public class ListNode {4* int val;5* ListNode next;6* ListNode(int x) { val = x; }7* }8*/9publicclassSolution {10publicListNode swapPairs(ListNode head) {11if(head ==null)returnhead;12//一般需要处理head的时候会用到dumpnode,...
24. Swap Nodes in Pairs Medium Topics Companies Given a linked list, swap every two adjacent nodes and return its head. You must solve the problem without modifying the values in the list's nodes (i.e., only nodes themselves may be changed.) Example 1: Input: head = [1,2,3,4] ...
leetcode 24. Swap Nodes in Pairs Given a linked list, swap every two adjacent nodes and return its head. For example, Given 1->2->3->4, you should return the list as 2->1->4->3. Your algorithm should use only constant space. You may not modify the values in the list, only ...
Leetcode-Swap Nodes in Pairs 一、题目——Swap Nodes in Pairs Given a linked list, swap every two adjacent nodes and return its head. For example, Given1->2->3->4, you should return the list as2->1->4->3. Your algorithm should use only constant space. You maynotmodify the values...
* Definition for singly-linked list. * struct ListNode { * int val; * struct ListNode *next; * }; */structListNode*swapPairs(structListNode*head){structListNode*p=head,*q=head;if(p==head&&p!=NULL&&p->next!=NULL){head=p->next;p->next=head->next;head->next=p;p=p->next;}while...
* ListNode(int x) { val = x; } * } */publicclassSolution{/** * @param head a ListNode * @return a ListNode */publicListNodeswapPairs(ListNodehead){ListNodedummy=newListNode(0);dummy.next=head;head=dummy;while(head.next!=null&&head.next.next!=null){ListNoden1=head.next,n2=head.next...
[LeetCode] Swap Nodes in Pairs 2015-08-26 10:28 −Given a linked list, swap every two adjacent nodes and return its head. For example,Given 1->2->3->4, you should return the list as ... 李小橘er 0 310 Leetcode: Swap Nodes in Pairs ...