Reverse a singly linked list.

含义：翻转一个单列表

1     public ListNode reverseList(ListNode head) { 2         ListNode newHead=null; 3         while (head != null) 4         { 5             ListNode next = head.next; 6             head.next = newHead; 7             newHead = head; 8             head = next; 9         }10         return newHead;        11     }

 

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