code. compile. run. debug. share.
/**
* Definition for singly-linked list.
* public class ListNode {
* int val;
* ListNode next;
* ListNode() {}
* ListNode(int val) { this.val = val; }
* ListNode(int val, ListNode next) { this.val = val; this.next = next; }
* }
*/
class Solution {
public ListNode reverseList(ListNode head) {
if(head.next==null)
{
return head;
}
ListNode H=head;
head=head.next;
ListNode temp=reverseList(head);
ListNode newHead=temp;
ListNode tt=newHead;
while(tt.next!=null)
{
tt= tt.next;
}
tt.next=H;
return newHead;
}
}
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