24. Swap Nodes in Pairs Solved 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,...
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 may not modify the values in the list, only nodes itself can be...
关键点:换位置时候先后顺序 /*** Definition for singly-linked list. * public class ListNode { * int val; * ListNode next; * ListNode(int x) { val = x; } * }*/classSolution {publicListNode swapPairs(ListNode head) { ListNode dummy=newListNode(0); dummy.next=head; ListNode p=dummy;wh...
24. Swap Nodes in Pairs Given a linked list, swap every two adjacent nodes and return its head. You maynotmodify the values in the list's nodes, only nodes itself may be changed. Example: Given 1->2->3->4, you should return the list as 2->1->4->3. 思路: 链表的翻转实现题,...
*/class Solution{public:ListNode*swapPairs(ListNode*head){if(!head||!head->next)returnhead;// 迭代,两两交换即可ListNode*dummy=newListNode(-1),*cur=dummy;cur->next=head;while(cur->next&&cur->next->next){ListNode*node1=cur->next;ListNode*node2=cur->next->next;cur->next=node2;node1-...
每日算法之二十二: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 may not...
You may not modify the values in the list's nodes, only nodes itself may be changed. Example: Given 1->2->3->4, you should return the list as 2->1->4->3. AC代码1 classSolution{public:ListNode*swapPairs(ListNode*head){ListNode*dummy=newListNode(-1),*pre=dummy;dummy->next=head;...
【刷题笔记】24. Swap Nodes in Pairs 题目 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: Given1->2->3->4,you shouldreturnthe list as2->1->4->3....
Can you solve this real interview question? Swap Nodes in Pairs - 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 chan
Swap Nodes in Pairs For example, Given 1->2->3->4, you should return the list as 2->1->4->3. Solution publicclassSolution{publicListNode swapPairs(ListNode head) {if(head ==null|| head.next==null)returnhead; ListNode dummy =newListNode(0); ...