Node reverseList(Node head) { if(head == null || head.next == null) return head; Node p = reverseList(head.next); head.next.next = head; head.next = null; return p; }
Node reverseList(Node head) { if(head == null || head.next == null) return head; Node p = reverseList(head.next); head.next.next = head; head.next = null; return p; }