[leetcode]51 Delete Node in a Linked List

题目链接：https://leetcode.com/problems/delete-node-in-a-linked-list/

runtime：16ms

1、问题

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.

2、分析

这是一道有技巧的题目，咋一看不能解，但是链表的内容是可以变得，将当前节点的内容换成下一个节点的内容，删除下一个节点，解决问题。

3、小结

换一个思路，豁然开朗~

4、实现

/**
* Definition for singly-linked list.
* struct ListNode {
*     int val;
*     ListNode *next;
*     ListNode(int x) : val(x), next(NULL) {}
* };
*/
class Solution {
public:
void deleteNode(ListNode* node) {
ListNode *p = node->next;
ListNode *q = p->next;
node->val = p->val;
node->next = q;
delete(p);
}
};

5、反思

略