feat: 添加机器人二维码

SunJulong · Apr 27, 2019 · 8bdef01 · 8bdef01
1 parent 69e9fb0
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diff --git a/README.md b/README.md
@@ -189,6 +189,6 @@ anki - 文件 - 导入 - 下拉格式选择“打包的 anki集合”，然后
 
 (qq 群)
 
-![wechat-group-chat](./assets/wechat-group-chat.jpg)
+![wechat-group-chat](./assets/wechat-group-chat.jpeg)
 
-(微信群， 由于微信的限制，只可以七天之内才能加入)
+(由于微信的限制，100个人以上只能邀请加入， 你可以添加我的机器人回复“leetcode”拉你进群)
diff --git a/assets/wechat-group-chat.jpeg b/assets/wechat-group-chat.jpeg
diff --git a/problems/20.validParentheses.md b/problems/20.validParentheses.md
@@ -2,6 +2,8 @@
 https://leetcode.com/problems/valid-parentheses/description
 
 ## 题目描述
+
+```
 Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.
 
 An input string is valid if:
@@ -30,7 +32,7 @@ Example 5:
 
 Input: "{[]}"
 Output: true
-
+```
 
 ## 思路