203. Remove Linked List Elements

题目

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

Credits:Special thanks to @mithmatt for adding this problem and creating all test cases.

解题思路

见程序注释