题解 | #删除链表的倒数第n个节点#
删除链表的倒数第n个节点
https://www.nowcoder.com/practice/f95dcdafbde44b22a6d741baf71653f6
/* * function ListNode(x){ * this.val = x; * this.next = null; * } */ /** * 代码中的类名、方法名、参数名已经指定,请勿修改,直接返回方法规定的值即可 * * * @param head ListNode类 * @param n int整型 * @return ListNode类 */ function removeNthFromEnd( head , n ) { let fast = head let slow = head // fast移动 for(let i = 0; i < n; i++) { fast = fast.next } // 如果fast为空,表示删除的是头结点 if(fast === null) { return head.next } while(fast.next) { fast = fast.next slow = slow.next } slow.next = slow.next.next return head } module.exports = { removeNthFromEnd : removeNthFromEnd };