feat: update leetcode contest

Author: yanglbme

images/Guardian.gif

@@ -29,7 +29,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://assets.leetcode.com/uploads/2022/06/07/graph4drawio-1.png" style="width: 171px; height: 161px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2300-2399/2360.Longest%20Cycle%20in%20a%20Graph/images/graph4drawio-1.png" style="width: 171px; height: 161px;" /></p>
 
 <pre>
 <b>输入：</b>edges = [2,-1,3,1]

images/Knight.gif

@@ -3,6 +3,18 @@
 [English Version](/solution/CONTEST_README_EN.md)
 
 
+## 段位与荣誉勋章
+
+竞赛排名根据 竞赛积分（周赛和双周赛）进行计算，注册新用户的基础分值为 $1500$ 分，在竞赛积分 $\ge1600$ 的用户中，根据比例 $5\%$、$20\%$、$75\%$ 设定三档段位，段位每周比赛结束后计算一次。
+
+如果竞赛积分处于段位的临界值，在每周比赛结束重新计算后会出现段位升级或降级的情况。段位升级或降级后会自动替换对应的荣誉勋章。
+
+| 段位  | 比例   | 段位名   | 分数线    | 勋章展示                                                                    |
+| ----- | ------ | -------- | --------- | --------------------------------------------------------------------------- |
+| $LV3$ | $5\%$  | $Guardian$ | $\ge2250$ | ![](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/images/Guardian.gif) |
+| $LV2$ | $20\%$ | $Knight$   | $\ge1860$ | ![](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/images/Knight.gif)   |
+| $LV1$ | $75\%$ | -        | -         | -                                                                           |
+
 ## 赛后估分网站
 
 https://lcpredictor.herokuapp.com/

solution/2300-2399/2360.Longest Cycle in a Graph/README.md

@@ -2,6 +2,20 @@
 
 [中文文档](/solution/CONTEST_README.md)
 
+## Contest Rating & Badge
+
+The contest badge is calculated based on the contest rating.
+
+For LeetCoders with rating >=1600,
+If you are in the top 5% of the contest rating, you’ll get the “Guardian” badge.
+
+![](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/images/Guardian.gif)
+
+If you are in the top 25% of the contest rating, you’ll get the “Knight” badge.
+
+![](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/images/Knight.gif)
+
+For top 10 users (excluding LCCN users), your LeetCode ID will be colored orange on the ranking board. You'll also have the honor with you when you post/comment under discuss.
 
 ## Rating Predictor