Swap Nodes in Pairs 2020-09-11 05:13
public static ListNode swapPairs(ListNode head) {
if (head == null || head.next == null) {
return head;
}
ListNode cursor = head.next;
head.next = swapPairs(cursor.next);
cursor.next = head;
return cursor;
}
| Runtime | Memory |
|---|---|
| 0 ms | 36.9 MB |
EOF