237. Delete Node in a Linked List
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.
这个题的难点是无法得知node前面的node, 那么可以用赋值解决。将要删除的点的值换为下一个点的值,并删除下一个点。 此处需要注意该题有except the tail. 不然需要讨论边界条件。
public void DeleteNode(ListNode node) { node.val = node.next.val; node.next = node.next.next; }