README.md

Author: bestgopher

README.md

@@ -2,7 +2,7 @@
 
 | Total | Easy | Medium | Hard |
 | :----: | :----: | :----: | :----: |
-| 810 | 359 | 423 | 28 |
+| 811 | 359 | 424 | 28 |
 
 ### 题目
 
@@ -660,6 +660,7 @@
 |3221 | 找出峰值 | [src](https://github.com/rustors/leetcode/blob/main/src/bin/find-the-peaks.rs) | [leetcode](https://leetcode-cn.com/problems/find-the-peaks/) | Easy |
 |3226 | 最小数字游戏 | [src](https://github.com/rustors/leetcode/blob/main/src/bin/minimum-number-game.rs) | [leetcode](https://leetcode-cn.com/problems/minimum-number-game/) | Easy |
 |3227 | 找出缺失和重复的数字 | [src](https://github.com/rustors/leetcode/blob/main/src/bin/find-missing-and-repeated-values.rs) | [leetcode](https://leetcode-cn.com/problems/find-missing-and-repeated-values/) | Easy |
+|3228 | 移除后集合的最多元素数 | [src](https://github.com/rustors/leetcode/blob/main/src/bin/maximum-size-of-a-set-after-removals.rs) | [leetcode](https://leetcode-cn.com/problems/maximum-size-of-a-set-after-removals/) | Medium |
 |3231 | 需要添加的硬币的最小数量 | [src](https://github.com/rustors/leetcode/blob/main/src/bin/minimum-number-of-coins-to-be-added.rs) | [leetcode](https://leetcode-cn.com/problems/minimum-number-of-coins-to-be-added/) | Medium |
 |3234 | 双模幂运算 | [src](https://github.com/rustors/leetcode/blob/main/src/bin/double-modular-exponentiation.rs) | [leetcode](https://leetcode-cn.com/problems/double-modular-exponentiation/) | Medium |
 |3241 | 划分数组并满足最大差限制 | [src](https://github.com/rustors/leetcode/blob/main/src/bin/divide-array-into-arrays-with-max-difference.rs) | [leetcode](https://leetcode-cn.com/problems/divide-array-into-arrays-with-max-difference/) | Medium |