lc203移除链表元素思路使用虚拟头节点以便操作头节点,逻辑判断处注意模拟代码 /** * Definition for singly-linked list. * public class ListNode { * int val; * ListNode next; * ListNode() {} * ListNode(int val) { this.val = val; } * ListNode(int val, ListNode next) { this.val = val; this.next = next; } * } */ ...