From 1f94655e9a3f2a91075b43477ef2cbe648891083 Mon Sep 17 00:00:00 2001
From: qiufeihong2018 <15058301288@163.com>
Date: Tue, 23 Apr 2024 15:26:56 +0800
Subject: [PATCH] =?UTF-8?q?refactor:=20=E4=BC=98=E5=8C=960019.=E5=88=A0?=
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---
 ...0019.删除链表的倒数第N个节点.md | 24 +++++++++++--------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/problems/0019.删除链表的倒数第N个节点.md b/problems/0019.删除链表的倒数第N个节点.md
index 9e180f75..4a973edb 100644
--- a/problems/0019.删除链表的倒数第N个节点.md
+++ b/problems/0019.删除链表的倒数第N个节点.md
@@ -22,10 +22,12 @@
 
 输入：head = [1,2,3,4,5], n = 2
 输出：[1,2,3,5]
+
 示例 2：
 
 输入：head = [1], n = 1
 输出：[]
+
 示例 3：
 
 输入：head = [1,2], n = 1
@@ -193,16 +195,18 @@ func removeNthFromEnd(head *ListNode, n int) *ListNode {
  * @param {number} n
  * @return {ListNode}
  */
-var removeNthFromEnd = function(head, n) {
-    let ret = new ListNode(0, head),
-        slow = fast = ret;
-    while(n--) fast = fast.next;
-    while (fast.next !== null) {
-        fast = fast.next; 
-        slow = slow.next
-    };
-    slow.next = slow.next.next;
-    return ret.next;
+var removeNthFromEnd = function (head, n) {
+  // 创建哨兵节点，简化解题逻辑
+  let dummyHead = new ListNode(0, head);
+  let fast = dummyHead;
+  let slow = dummyHead;
+  while (n--) fast = fast.next;
+  while (fast.next !== null) {
+    slow = slow.next;
+    fast = fast.next;
+  }
+  slow.next = slow.next.next;
+  return dummyHead.next;
 };
 ```
 ### TypeScript: