Tuesday, August 4, 2015

Delete Node in a Linked List #LeetCode

Problem Reference:
https://leetcode.com/problems/delete-node-in-a-linked-list/

Problem Statement:
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.

Solution:

/**
 * 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* next = node->next;
        node->val = next->val;
        node->next = next->next;
    }
};

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