feat: add biweekly contest 117

solution/2900-2999/2928.Distribute Candies Among Children I/README.md

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+# [2928. 给小朋友们分糖果 I](https://leetcode.cn/problems/distribute-candies-among-children-i)
+
+[English Version](/solution/2900-2999/2928.Distribute%20Candies%20Among%20Children%20I/README_EN.md)
+
+## 题目描述
+
+<!-- 这里写题目描述 -->
+
+<p>给你两个正整数&nbsp;<code>n</code> 和&nbsp;<code>limit</code>&nbsp;。</p>
+
+<p>请你将 <code>n</code>&nbsp;颗糖果分给 <code>3</code>&nbsp;位小朋友，确保没有任何小朋友得到超过 <code>limit</code>&nbsp;颗糖果，请你返回满足此条件下的&nbsp;<strong>总方案数</strong>&nbsp;。</p>
+
+<p>&nbsp;</p>
+
+<p><strong class="example">示例 1：</strong></p>
+
+<pre>
+<b>输入：</b>n = 5, limit = 2
+<b>输出：</b>3
+<b>解释：</b>总共有 3 种方法分配 5 颗糖果，且每位小朋友的糖果数不超过 2 ：(1, 2, 2) ，(2, 1, 2) 和 (2, 2, 1) 。
+</pre>
+
+<p><strong class="example">示例 2：</strong></p>
+
+<pre>
+<b>输入：</b>n = 3, limit = 3
+<b>输出：</b>10
+<b>解释：</b>总共有 10 种方法分配 3 颗糖果，且每位小朋友的糖果数不超过 3 ：(0, 0, 3) ，(0, 1, 2) ，(0, 2, 1) ，(0, 3, 0) ，(1, 0, 2) ，(1, 1, 1) ，(1, 2, 0) ，(2, 0, 1) ，(2, 1, 0) 和 (3, 0, 0) 。
+</pre>
+
+<p>&nbsp;</p>
+
+<p><strong>提示：</strong></p>
+
+<ul>
+	<li><code>1 &lt;= n &lt;= 50</code></li>
+	<li><code>1 &lt;= limit &lt;= 50</code></li>
+</ul>
+
+## 解法
+
+<!-- 这里可写通用的实现逻辑 -->
+
+<!-- tabs:start -->
+
+### **Python3**
+
+<!-- 这里可写当前语言的特殊实现逻辑 -->
+
+```python
+
+```
+
+### **Java**
+
+<!-- 这里可写当前语言的特殊实现逻辑 -->
+
+```java
+
+```
+
+### **C++**
+
+```cpp
+
+```
+
+### **Go**
+
+```go
+
+```
+
+### **...**
+
+```
+
+```
+
+<!-- tabs:end -->

solution/2900-2999/2928.Distribute Candies Among Children I/README_EN.md

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+# [2928. Distribute Candies Among Children I](https://leetcode.com/problems/distribute-candies-among-children-i)
+
+[中文文档](/solution/2900-2999/2928.Distribute%20Candies%20Among%20Children%20I/README.md)
+
+## Description
+
+<p>You are given two positive integers <code>n</code> and <code>limit</code>.</p>
+
+<p>Return <em>the <strong>total number</strong> of ways to distribute </em><code>n</code> <em>candies among </em><code>3</code><em> children such that no child gets more than </em><code>limit</code><em> candies.</em></p>
+
+<p>&nbsp;</p>
+<p><strong class="example">Example 1:</strong></p>
+
+<pre>
+<strong>Input:</strong> n = 5, limit = 2
+<strong>Output:</strong> 3
+<strong>Explanation:</strong> There are 3 ways to distribute 5 candies such that no child gets more than 2 candies: (1, 2, 2), (2, 1, 2) and (2, 2, 1).
+</pre>
+
+<p><strong class="example">Example 2:</strong></p>
+
+<pre>
+<strong>Input:</strong> n = 3, limit = 3
+<strong>Output:</strong> 10
+<strong>Explanation:</strong> There are 10 ways to distribute 3 candies such that no child gets more than 3 candies: (0, 0, 3), (0, 1, 2), (0, 2, 1), (0, 3, 0), (1, 0, 2), (1, 1, 1), (1, 2, 0), (2, 0, 1), (2, 1, 0) and (3, 0, 0).
+</pre>
+
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li><code>1 &lt;= n &lt;= 50</code></li>
+	<li><code>1 &lt;= limit &lt;= 50</code></li>
+</ul>
+
+## Solutions
+
+<!-- tabs:start -->
+
+### **Python3**
+
+```python
+
+```
+
+### **Java**
+
+```java
+
+```
+
+### **C++**
+
+```cpp
+
+```
+
+### **Go**
+
+```go
+
+```
+
+### **...**
+
+```
+
+```
+
+<!-- tabs:end -->

solution/2900-2999/2929.Distribute Candies Among Children II/README.md

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+# [2929. 给小朋友们分糖果 II](https://leetcode.cn/problems/distribute-candies-among-children-ii)
+
+[English Version](/solution/2900-2999/2929.Distribute%20Candies%20Among%20Children%20II/README_EN.md)
+
+## 题目描述
+
+<!-- 这里写题目描述 -->
+
+<p>给你两个正整数&nbsp;<code>n</code> 和&nbsp;<code>limit</code>&nbsp;。</p>
+
+<p>请你将 <code>n</code>&nbsp;颗糖果分给 <code>3</code>&nbsp;位小朋友，确保没有任何小朋友得到超过 <code>limit</code>&nbsp;颗糖果，请你返回满足此条件下的&nbsp;<strong>总方案数</strong>&nbsp;。</p>
+
+<p>&nbsp;</p>
+
+<p><strong class="example">示例 1：</strong></p>
+
+<pre>
+<b>输入：</b>n = 5, limit = 2
+<b>输出：</b>3
+<b>解释：</b>总共有 3 种方法分配 5 颗糖果，且每位小朋友的糖果数不超过 2 ：(1, 2, 2) ，(2, 1, 2) 和 (2, 2, 1) 。
+</pre>
+
+<p><strong class="example">示例 2：</strong></p>
+
+<pre>
+<b>输入：</b>n = 3, limit = 3
+<b>输出：</b>10
+<b>解释：</b>总共有 10 种方法分配 3 颗糖果，且每位小朋友的糖果数不超过 3 ：(0, 0, 3) ，(0, 1, 2) ，(0, 2, 1) ，(0, 3, 0) ，(1, 0, 2) ，(1, 1, 1) ，(1, 2, 0) ，(2, 0, 1) ，(2, 1, 0) 和 (3, 0, 0) 。
+</pre>
+
+<p>&nbsp;</p>
+
+<p><strong>提示：</strong></p>
+
+<ul>
+	<li><code>1 &lt;= n &lt;= 10<sup>6</sup></code></li>
+	<li><code>1 &lt;= limit &lt;= 10<sup>6</sup></code></li>
+</ul>
+
+## 解法
+
+<!-- 这里可写通用的实现逻辑 -->
+
+<!-- tabs:start -->
+
+### **Python3**
+
+<!-- 这里可写当前语言的特殊实现逻辑 -->
+
+```python
+
+```
+
+### **Java**
+
+<!-- 这里可写当前语言的特殊实现逻辑 -->
+
+```java
+
+```
+
+### **C++**
+
+```cpp
+
+```
+
+### **Go**
+
+```go
+
+```
+
+### **...**
+
+```
+
+```
+
+<!-- tabs:end -->

solution/2900-2999/2929.Distribute Candies Among Children II/README_EN.md

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+# [2929. Distribute Candies Among Children II](https://leetcode.com/problems/distribute-candies-among-children-ii)
+
+[中文文档](/solution/2900-2999/2929.Distribute%20Candies%20Among%20Children%20II/README.md)
+
+## Description
+
+<p>You are given two positive integers <code>n</code> and <code>limit</code>.</p>
+
+<p>Return <em>the <strong>total number</strong> of ways to distribute </em><code>n</code> <em>candies among </em><code>3</code><em> children such that no child gets more than </em><code>limit</code><em> candies.</em></p>
+
+<p>&nbsp;</p>
+<p><strong class="example">Example 1:</strong></p>
+
+<pre>
+<strong>Input:</strong> n = 5, limit = 2
+<strong>Output:</strong> 3
+<strong>Explanation:</strong> There are 3 ways to distribute 5 candies such that no child gets more than 2 candies: (1, 2, 2), (2, 1, 2) and (2, 2, 1).
+</pre>
+
+<p><strong class="example">Example 2:</strong></p>
+
+<pre>
+<strong>Input:</strong> n = 3, limit = 3
+<strong>Output:</strong> 10
+<strong>Explanation:</strong> There are 10 ways to distribute 3 candies such that no child gets more than 3 candies: (0, 0, 3), (0, 1, 2), (0, 2, 1), (0, 3, 0), (1, 0, 2), (1, 1, 1), (1, 2, 0), (2, 0, 1), (2, 1, 0) and (3, 0, 0).
+</pre>
+
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li><code>1 &lt;= n &lt;= 10<sup>6</sup></code></li>
+	<li><code>1 &lt;= limit &lt;= 10<sup>6</sup></code></li>
+</ul>
+
+## Solutions
+
+<!-- tabs:start -->
+
+### **Python3**
+
+```python
+
+```
+
+### **Java**
+
+```java
+
+```
+
+### **C++**
+
+```cpp
+
+```
+
+### **Go**
+
+```go
+
+```
+
+### **...**
+
+```
+
+```
+
+<!-- tabs:end -->

solution/2900-2999/2930.Number of Strings Which Can Be Rearranged to Contain Substring/README.md

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+# [2930. 重新排列后包含指定子字符串的字符串数目](https://leetcode.cn/problems/number-of-strings-which-can-be-rearranged-to-contain-substring)
+
+[English Version](/solution/2900-2999/2930.Number%20of%20Strings%20Which%20Can%20Be%20Rearranged%20to%20Contain%20Substring/README_EN.md)
+
+## 题目描述
+
+<!-- 这里写题目描述 -->
+
+<p>给你一个整数&nbsp;<code>n</code>&nbsp;。</p>
+
+<p>如果一个字符串&nbsp;<code>s</code>&nbsp;只包含小写英文字母，<strong>且</strong>&nbsp;将 <code>s</code>&nbsp;的字符重新排列后，新字符串包含&nbsp;<strong>子字符串</strong>&nbsp;<code>"leet"</code> ，那么我们称字符串 <code>s</code>&nbsp;是一个 <strong>好</strong>&nbsp;字符串。</p>
+
+<p>比方说：</p>
+
+<ul>
+	<li>字符串&nbsp;<code>"lteer"</code>&nbsp;是好字符串，因为重新排列后可以得到&nbsp;<code>"leetr"</code>&nbsp;。</li>
+	<li><code>"letl"</code>&nbsp;不是好字符串，因为无法重新排列并得到子字符串&nbsp;<code>"leet"</code>&nbsp;。</li>
+</ul>
+
+<p>请你返回长度为 <code>n</code>&nbsp;的好字符串 <strong>总</strong>&nbsp;数目。</p>
+
+<p>由于答案可能很大，将答案对<strong>&nbsp;</strong><code>10<sup>9</sup> + 7</code>&nbsp;<strong>取余</strong>&nbsp;后返回。</p>
+
+<p><strong>子字符串</strong>&nbsp;是一个字符串中一段连续的字符序列。</p>
+
+<div class="notranslate" style="all: initial;">&nbsp;</div>
+
+<p><strong class="example">示例 1：</strong></p>
+
+<pre>
+<b>输入：</b>n = 4
+<b>输出：</b>12
+<b>解释：</b>总共有 12 个字符串重新排列后包含子字符串 "leet" ："eelt" ，"eetl" ，"elet" ，"elte" ，"etel" ，"etle" ，"leet" ，"lete" ，"ltee" ，"teel" ，"tele" 和 "tlee" 。
+</pre>
+
+<p><strong class="example">示例 2：</strong></p>
+
+<pre>
+<b>输入：</b>n = 10
+<b>输出：</b>83943898
+<b>解释：</b>长度为 10 的字符串重新排列后包含子字符串 "leet" 的方案数为 526083947580 。所以答案为 526083947580 % (10<sup>9</sup> + 7) = 83943898 。
+</pre>
+
+<p>&nbsp;</p>
+
+<p><strong>提示：</strong></p>
+
+<ul>
+	<li><code>1 &lt;= n &lt;= 10<sup>5</sup></code></li>
+</ul>
+
+## 解法
+
+<!-- 这里可写通用的实现逻辑 -->
+
+<!-- tabs:start -->
+
+### **Python3**
+
+<!-- 这里可写当前语言的特殊实现逻辑 -->
+
+```python
+
+```
+
+### **Java**
+
+<!-- 这里可写当前语言的特殊实现逻辑 -->
+
+```java
+
+```
+
+### **C++**
+
+```cpp
+
+```
+
+### **Go**
+
+```go
+
+```
+
+### **...**
+
+```
+
+```
+
+<!-- tabs:end -->