From ca38cf11acbeab78b716be08cfabfddf8933d24a Mon Sep 17 00:00:00 2001
From: wangzeping722 <981819494@qq.com>
Date: Tue, 12 Feb 2019 20:21:57 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E6=94=B9=E4=BB=A3=E7=A0=81?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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---
 docs/notes/剑指 offer 题解.md | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/docs/notes/剑指 offer 题解.md b/docs/notes/剑指 offer 题解.md
index 14bf97c1..f2aa638a 100644
--- a/docs/notes/剑指 offer 题解.md	
+++ b/docs/notes/剑指 offer 题解.md	
@@ -244,11 +244,10 @@ public String replaceSpace(StringBuffer str) {
 
 ```java
 public ArrayList<Integer> printListFromTailToHead(ListNode listNode) {
-    ArrayList<Integer> ret = new ArrayList<>();
-    if (listNode != null) {
-        ret.addAll(printListFromTailToHead(listNode.next));
-        ret.add(listNode.val);
-    }
+    if (listNode == null) 
+        return new ArrayList<>();
+    ArrayList<Integer> ret = printListFromTailToHead(listNode.next);
+    ret.add(listNode.val);
     return ret;
 }
 ```