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[LeetCode] 237. Delete Node in a Linked List #237

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grandyang opened this issue May 30, 2019 · 0 comments
Open

[LeetCode] 237. Delete Node in a Linked List #237

grandyang opened this issue May 30, 2019 · 0 comments

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@grandyang
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grandyang commented May 30, 2019

 

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.

 

这道题让我们删除链表的一个节点,更通常不同的是,没有给我们链表的起点,只给我们了一个要删的节点,跟我们以前遇到的情况不太一样,我们之前要删除一个节点的方法是要有其前一个节点的位置,然后将其前一个节点的next连向要删节点的下一个,然后delete掉要删的节点即可。这道题的处理方法是先把当前节点的值用下一个节点的值覆盖了,然后我们删除下一个节点即可,代码如下:

 

C++ 解法:

class Solution {
public:
    void deleteNode(ListNode* node) {
        node->val = node->next->val;
        ListNode *tmp = node->next;
        node->next = tmp->next;
        delete tmp;
    }
};

 

Java 解法:

public class Solution {
    public void deleteNode(ListNode node) {
        node.val = node.next.val;
        node.next = node.next.next;
    }
}

 

LeetCode All in One 题目讲解汇总(持续更新中...)

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