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chore: update lc problems (#1766)
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‎.github/workflows/sync.yml

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name: Sync
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on:
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push:
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branches: [ main ]
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jobs:
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sync:
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runs-on: ubuntu-latest
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if: github.repository == 'doocs/leetcode'
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steps:
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- name: Sync to gitee.com
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uses: wearerequired/git-mirror-action@master
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env:
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SSH_PRIVATE_KEY: ${{ secrets.RSA_PRIVATE_KEY }}
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with:
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source-repo: git@github.com:doocs/leetcode.git
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destination-repo: git@gitee.com:Doocs/leetcode.git
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- name: Build Gitee Pages
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uses: yanglbme/gitee-pages-action@main
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with:
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gitee-username: yanglbme
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gitee-password: ${{ secrets.GITEE_PASSWORD }}
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gitee-repo: doocs/leetcode
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branch: main

‎solution/2800-2899/2877.Create a DataFrame from List/README.md

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# [2877. Create a DataFrame from List](https://leetcode.cn/problems/create-a-dataframe-from-list)
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# [2877. 从表中创建 DataFrame](https://leetcode.cn/problems/create-a-dataframe-from-list)
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[English Version](/solution/2800-2899/2877.Create%20a%20DataFrame%20from%20List/README_EN.md)
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## 题目描述
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<!-- 这里写题目描述 -->
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<p>Write a solution to <strong>create</strong> a DataFrame from a 2D list called <code>student_data</code>. This 2D list contains the IDs and ages of some students.</p>
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<p>编写一个解决方案，从名为 &nbsp;<code>student_data</code>&nbsp;的二维列表&nbsp;<b>创建 </b>一个 DataFrame 。这个二维列表包含一些学生的 ID 和年龄信息。</p>
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<p>The DataFrame should have two columns, <code>student_id</code> and <code>age</code>, and be in the same order as the original 2D list.</p>
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<p>DataFrame 应该有两列，&nbsp;<code>student_id</code>&nbsp;和&nbsp;<code>age</code>，并且与原始二维列表的顺序相同。</p>
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<p>The result format is in the following example.</p>
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<p>返回结果格式如下示例所示。</p>
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<p>&nbsp;</p>
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<p><strong class="example">Example 1:</strong></p>
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<p><strong class="example">示例 1：</strong></p>
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<pre>
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<strong>Input:
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<strong>输入：
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</strong>student_data:<strong>
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</strong><code>[
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[1, 15],
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[2, 11],
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[3, 11],
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[4, 20]
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]</code>
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<strong>Output:</strong>
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<b>输出：</b>
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+------------+-----+
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| student_id | age |
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+------------+-----+
@@ -33,8 +34,8 @@
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| 3 | 11 |
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| 4 | 20 |
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+------------+-----+
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<strong>Explanation:</strong>
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A DataFrame was created on top of student_data, with two columns named <code>student_id</code> and <code>age</code>.
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<b>解释：</b>
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在 student_data 上创建了一个 DataFrame，包含 student_id 和 age 两列。
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</pre>
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## 解法

‎solution/2800-2899/2881.Create a New Column/README.md

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# [2881. Create a New Column](https://leetcode.cn/problems/create-a-new-column)
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# [2881. 创建新列](https://leetcode.cn/problems/create-a-new-column)
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[English Version](/solution/2800-2899/2881.Create%20a%20New%20Column/README_EN.md)
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@@ -16,17 +16,18 @@ DataFrame <code>employees</code>
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+-------------+--------+
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</pre>
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<p>A&nbsp;company plans to provide its employees with a bonus.</p>
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<p>一家公司计划为员工提供奖金。</p>
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<p>Write a solution to create a new column name <code>bonus</code> that contains the <strong>doubled values</strong> of the <code>salary</code> column.</p>
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<p>编写一个解决方案，创建一个名为&nbsp;<code>bonus</code>&nbsp;的新列，其中包含&nbsp;<code>salary</code>&nbsp;值的&nbsp;<strong>两倍</strong>。</p>
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<p>The result format is in the following example.</p>
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<p>返回结果格式如下示例所示。</p>
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<p>&nbsp;</p>
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<p><strong class="example">Example 1:</strong></p>
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<p><b>示例 1:</b></p>
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<pre>
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<strong>Input:</strong>
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<b>输入：</b>
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DataFrame employees
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+---------+--------+
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| name | salary |
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| Finn | 74576 |
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| Thomas | 24433 |
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+---------+--------+
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<strong>Output:</strong>
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<b>输出：</b>
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+---------+--------+--------+
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| name | salary | bonus |
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+---------+--------+--------+
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| Finn | 74576 | 149152 |
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| Thomas | 24433 | 48866 |
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+---------+--------+--------+
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<strong>Explanation:</strong>
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A new column bonus is created by doubling the value in the column salary.</pre>
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<b>解释：</b>
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通过将salary列中的值加倍创建了一个新的bonus列。</pre>
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## 解法
5657

‎solution/2800-2899/2882.Drop Duplicate Rows/README.md

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# [2882. Drop Duplicate Rows](https://leetcode.cn/problems/drop-duplicate-rows)
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# [2882. 删去重复的行](https://leetcode.cn/problems/drop-duplicate-rows)
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[English Version](/solution/2800-2899/2882.Drop%20Duplicate%20Rows/README_EN.md)
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@@ -17,16 +17,18 @@ DataFrame customers
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+-------------+--------+
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</pre>
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<p>There are some duplicate rows in the DataFrame based on the <code>email</code> column.</p>
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<p>在 DataFrame 中基于&nbsp;<code>email</code>&nbsp;列存在一些重复行。</p>
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<p>Write a solution to remove these duplicate rows and keep only the <strong>first</strong> occurrence.</p>
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<p>编写一个解决方案，删除这些重复行，仅保留第一次出现的行。</p>
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<p>The result format is in the following example.</p>
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<p>返回结果格式如下例所示。</p>
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<p>&nbsp;</p>
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<p><strong>示例 1:</strong></p>
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<pre>
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<strong class="example">Example 1:</strong>
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<strong>Input:</strong>
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<b>输入：</b>
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+-------------+---------+---------------------+
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| customer_id | name | email |
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+-------------+---------+---------------------+
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| 5 | Finn | john@example.com |
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| 6 | Violet | alice@example.com |
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+-------------+---------+---------------------+
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<strong>Output: </strong>
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<b>输出：</b>
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+-------------+---------+---------------------+
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| customer_id | name | email |
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+-------------+---------+---------------------+
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| 4 | Alice | john@example.com |
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| 6 | Violet | alice@example.com |
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+-------------+---------+---------------------+
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<strong>Explanation:</strong>
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Alic (customer_id = 4) and Finn (customer_id = 5) both use john@example.com, so only the first occurrence of this email is retained.
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<b>解释：</b>
53+
Alice (customer_id = 4) 和 Finn (customer_id = 5) 都使用 john@example.com，因此只保留该邮箱地址的第一次出现。
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</pre>
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## 解法

‎solution/2800-2899/2883.Drop Missing Data/README.md

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# [2883. Drop Missing Data](https://leetcode.cn/problems/drop-missing-data)
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# [2883. 删去丢失的数据](https://leetcode.cn/problems/drop-missing-data)
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[English Version](/solution/2800-2899/2883.Drop%20Missing%20Data/README_EN.md)
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+-------------+--------+
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</pre>
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<p>There are some rows having missing values in the <code>name</code> column.</p>
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<p>在 <code>name</code> 列里有一些具有缺失值的行。</p>
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<p>Write a solution to remove the rows with missing values.</p>
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<p>编写一个解决方案，删除具有缺失值的行。</p>
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<p>The result format is in the following example.</p>
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<p>返回结果格式如下示例所示。</p>
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<p>&nbsp;</p>
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<p><strong class="example">Example 1:</strong></p>
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<p><b>示例 1:</b></p>
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<pre>
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<strong>Input:
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<strong>输入：
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</strong>+------------+-------+-----+
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| student_id | name | age |
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+------------+-------+-----+
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| 779 | None | 20 |
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| 849 | None | 14 |
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+------------+-------+-----+
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<strong>Output:
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<strong>输出：
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</strong>+------------+-------+-----+
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| student_id | name | age |
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+------------+-------+-----+
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| 32 | Piper | 5 |
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| 217 | Grace | 19 |
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+------------+-------+-----+
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<strong>Explanation:</strong>
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Students with ids 779 and 849 have empty values in the name column, so they will be removed.</pre>
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<b>解释：
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</b>学号为 779 和 849 的学生所在行在 name 列中有空值，因此它们将被删除。</pre>
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## 解法
5051

‎solution/2800-2899/2884.Modify Columns/README.md

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# [2884. Modify Columns](https://leetcode.cn/problems/modify-columns)
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# [2884. 修改列](https://leetcode.cn/problems/modify-columns)
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[English Version](/solution/2800-2899/2884.Modify%20Columns/README_EN.md)
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+-------------+--------+
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</pre>
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<p>A company intends to give its employees a pay rise.</p>
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<p>一家公司决定增加员工的薪水。</p>
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<p>Write a solution to <strong>modify</strong> the <code>salary</code> column by multiplying each salary by 2.</p>
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<p>编写一个解决方案，将每个员工的薪水乘以2来 <strong>修改</strong>&nbsp;<code>salary</code>&nbsp;列。</p>
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<p>The result format is in the following example.</p>
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<p>返回结果格式如下示例所示。</p>
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<p>&nbsp;</p>
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<p><strong class="example">Example 1:</strong></p>
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<p><b>示例 1:</b></p>
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<pre>
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<strong>Input:
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<strong>输入：
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</strong>DataFrame employees
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+---------+--------+
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| name | salary |
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| Mia | 62509 |
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| Ulysses | 54866 |
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+---------+--------+
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<strong>Output:
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<strong>输出：
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</strong>+---------+--------+
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| name | salary |
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+---------+--------+
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| Mia | 125018 |
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| Ulysses | 109732 |
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+---------+--------+
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<strong>Explanation:
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</strong>Every salary has been doubled.</pre>
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<strong>解释：
50+
</strong>每个人的薪水都被加倍。</pre>
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## 解法
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‎solution/2800-2899/2885.Rename Columns/README.md

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# [2885. Rename Columns](https://leetcode.cn/problems/rename-columns)
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# [2885. 重命名列](https://leetcode.cn/problems/rename-columns)
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[English Version](/solution/2800-2899/2885.Rename%20Columns/README_EN.md)
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+-------------+--------+
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</pre>
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<p>Write a solution to rename the columns as follows:</p>
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<p>编写一个解决方案，按以下方式重命名列：</p>
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<ul>
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<li><code>id</code> to <code>student_id</code></li>
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<li><code>first</code> to <code>first_name</code></li>
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<li><code>last</code> to <code>last_name</code></li>
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<li><code>age</code> to <code>age_in_years</code></li>
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<li><code>id</code>&nbsp;重命名为&nbsp;<code>student_id</code></li>
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<li><code>first</code>&nbsp;重命名为&nbsp;<code>first_name</code></li>
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<li><code>last</code>&nbsp;重命名为&nbsp;<code>last_name</code></li>
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<li><code>age</code>&nbsp;重命名为&nbsp;<code>age_in_years</code></li>
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</ul>
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<p>The result format is in the following example.</p>
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<p>返回结果格式如下示例所示。</p>
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<p>&nbsp;</p>
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<p><strong>示例 1:</strong></p>
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<pre>
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<strong class="example">Example 1:</strong>
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<strong>Input:
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<strong>输入：
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</strong>+----+---------+----------+-----+
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| id | first | last | age |
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+----+---------+----------+-----+
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| 4 | Georgia | Thompson | 18 |
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| 5 | Thomas | Moore | 10 |
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+----+---------+----------+-----+
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<strong>Output:</strong>
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<b>输出：</b>
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+------------+------------+-----------+--------------+
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| student_id | first_name | last_name | age_in_years |
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+------------+------------+-----------+--------------+
@@ -52,8 +54,8 @@ DataFrame <code>students</code>
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| 4 | Georgia | Thompson | 18 |
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| 5 | Thomas | Moore | 10 |
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+------------+------------+-----------+--------------+
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<strong>Explanation:</strong>
56-
The column names are changed accordingly.</pre>
57+
<b>解释：</b>
58+
列名已相应更换。</pre>
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## 解法
5961

‎solution/2800-2899/2886.Change Data Type/README.md

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# [2886. Change Data Type](https://leetcode.cn/problems/change-data-type)
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# [2886. 改变数据类型](https://leetcode.cn/problems/change-data-type)
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[English Version](/solution/2800-2899/2886.Change%20Data%20Type/README_EN.md)
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+-------------+--------+
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</pre>
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<p>Write a solution to correct the errors:</p>
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<p>编写一个解决方案来纠正以下错误：</p>
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<p>The <code>grade</code> column is stored as floats,&nbsp;convert it to integers.</p>
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<p>&nbsp;<code>grade</code>&nbsp;列被存储为浮点数，将它转换为整数。</p>
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<p>The result format is in the following example.</p>
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<p>返回结果格式如下示例所示。</p>
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<p>&nbsp;</p>
28+
29+
<p><strong>示例 1:</strong></p>
30+
2831
<pre>
29-
<strong class="example">Example 1:</strong>
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<strong>Input:
32+
<strong>输入：
3133
</strong>DataFrame students:
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+------------+------+-----+-------+
3335
| student_id | name | age | grade |
3436
+------------+------+-----+-------+
3537
| 1 | Ava | 6 | 73.0 |
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| 2 | Kate | 15 | 87.0 |
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+------------+------+-----+-------+
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<strong>Output:
40+
<strong>输出：
3941
</strong>+------------+------+-----+-------+
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| student_id | name | age | grade |
4143
+------------+------+-----+-------+
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| 1 | Ava | 6 | 73 |
4345
| 2 | Kate | 15 | 87 |
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+------------+------+-----+-------+
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<strong>Explanation:</strong>
46-
The data types of the column grade is converted to int.</pre>
47+
<b>解释：</b>
48+
grade 列的数据类型已转换为整数。</pre>
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## 解法
4951

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