reverse linked list in java to get both head and tail

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Gael
16 Jun 2018
1/*
2public class ListNode {
3    public int val;
4    public ListNode next;
5    public ListNode(int x) { val = x; next = null; }
6}
7*/
8
9public static ListNode[] reverse_linked_list(ListNode head) {
10
11        ListNode prev = null;
12        ListNode current = head;
13        ListNode next;
14
15        ListNode tail = head;
16
17        while (current != null) {
18
19            next = current.next;
20            current.next = prev;
21            prev = current;
22            current = next;
23        }
24
25        head = prev;
26
27        ListNode[] result = {head, tail};
28
29        return result;
30}
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