Write a function to delete a node (except the tail) in a singly linked list, given only access to that node.
Supposed the linked list is 1 -> 2 -> 3 -> 4 and you are given the third node with value 3, the linked list should become 1 -> 2 -> 4 after calling your function.
含义：给定列表中的某一个节点，删除该节点
1 public void deleteNode(ListNode node) { 2 node.val=node.next.val; 3 node.next=node.next.next; 4 }