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花花酱 LeetCode 203. Remove Linked List Elements

题目大意:移除单向链表中所有值等于val的节点。

Problem:

https://leetcode.com/problems/remove-linked-list-elements/description/

Remove all elements from a linked list of integers that have value val.

Example
Given: 1 –> 2 –> 6 –> 3 –> 4 –> 5 –> 6, val = 6
Return: 1 –> 2 –> 3 –> 4 –> 5

Idea:

Use a dummy head

Solution:

Time complexity: O(n)

Space complexity: O(1)

C++

 

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