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feat: add biweekly contest 153 #4308

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165 changes: 165 additions & 0 deletions solution/3400-3499/3498.Reverse Degree of a String/README.md
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---
comments: true
difficulty: 简单
edit_url: https://github.com/doocs/leetcode/edit/main/solution/3400-3499/3498.Reverse%20Degree%20of%20a%20String/README.md
---

<!-- problem:start -->

# [3498. 字符串的反转度](https://leetcode.cn/problems/reverse-degree-of-a-string)

[English Version](/solution/3400-3499/3498.Reverse%20Degree%20of%20a%20String/README_EN.md)

## 题目描述

<!-- description:start -->

<p>给你一个字符串 <code>s</code>，计算其 <strong>反转度</strong>。</p>

<p><strong>反转度</strong>的计算方法如下：</p>

<ol>
<li>对于每个字符，将其在 <strong>反转</strong> 字母表中的位置（<code>'a'</code> = 26, <code>'b'</code> = 25, ..., <code>'z'</code> = 1）与其在字符串中的位置（下标从<strong>1 </strong>开始）相乘。</li>
<li>将这些乘积加起来，得到字符串中所有字符的和。</li>
</ol>

<p>返回 <strong>反转度</strong>。</p>

<p>&nbsp;</p>

<p><strong class="example">示例 1：</strong></p>

<div class="example-block">
<p><strong>输入：</strong> <span class="example-io">s = "abc"</span></p>

<p><strong>输出：</strong> <span class="example-io">148</span></p>

<p><strong>解释：</strong></p>

<table style="border: 1px solid black;">
<tbody>
<tr>
<th style="border: 1px solid black;">字母</th>
<th style="border: 1px solid black;">反转字母表中的位置</th>
<th style="border: 1px solid black;">字符串中的位置</th>
<th style="border: 1px solid black;">乘积</th>
</tr>
<tr>
<td style="border: 1px solid black;"><code>'a'</code></td>
<td style="border: 1px solid black;">26</td>
<td style="border: 1px solid black;">1</td>
<td style="border: 1px solid black;">26</td>
</tr>
<tr>
<td style="border: 1px solid black;"><code>'b'</code></td>
<td style="border: 1px solid black;">25</td>
<td style="border: 1px solid black;">2</td>
<td style="border: 1px solid black;">50</td>
</tr>
<tr>
<td style="border: 1px solid black;"><code>'c'</code></td>
<td style="border: 1px solid black;">24</td>
<td style="border: 1px solid black;">3</td>
<td style="border: 1px solid black;">72</td>
</tr>
</tbody>
</table>

<p>反转度是 <code>26 + 50 + 72 = 148</code> 。</p>
</div>

<p><strong class="example">示例 2：</strong></p>

<div class="example-block">
<p><strong>输入：</strong> <span class="example-io">s = "zaza"</span></p>

<p><strong>输出：</strong> <span class="example-io">160</span></p>

<p><strong>解释：</strong></p>

<table style="border: 1px solid black;">
<tbody>
<tr>
<th style="border: 1px solid black;">字母</th>
<th style="border: 1px solid black;">反转字母表中的位置</th>
<th style="border: 1px solid black;">字符串中的位置</th>
<th style="border: 1px solid black;">乘积</th>
</tr>
<tr>
<td style="border: 1px solid black;"><code>'z'</code></td>
<td style="border: 1px solid black;">1</td>
<td style="border: 1px solid black;">1</td>
<td style="border: 1px solid black;">1</td>
</tr>
<tr>
<td style="border: 1px solid black;"><code>'a'</code></td>
<td style="border: 1px solid black;">26</td>
<td style="border: 1px solid black;">2</td>
<td style="border: 1px solid black;">52</td>
</tr>
<tr>
<td style="border: 1px solid black;"><code>'z'</code></td>
<td style="border: 1px solid black;">1</td>
<td style="border: 1px solid black;">3</td>
<td style="border: 1px solid black;">3</td>
</tr>
<tr>
<td style="border: 1px solid black;"><code>'a'</code></td>
<td style="border: 1px solid black;">26</td>
<td style="border: 1px solid black;">4</td>
<td style="border: 1px solid black;">104</td>
</tr>
</tbody>
</table>
</div>

<p>反转度是 <code>1 + 52 + 3 + 104 = 160</code>&nbsp;。</p>

<p>&nbsp;</p>

<p><strong>提示：</strong></p>

<ul>
<li><code>1 &lt;= s.length &lt;= 1000</code></li>
<li><code>s</code> 仅包含小写字母。</li>
</ul>

<!-- description:end -->

## 解法

<!-- solution:start -->

### 方法一

<!-- tabs:start -->

#### Python3

```python

```

#### Java

```java

```

#### C++

```cpp

```

#### Go

```go

```

<!-- tabs:end -->

<!-- solution:end -->

<!-- problem:end -->
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---
comments: true
difficulty: Easy
edit_url: https://github.com/doocs/leetcode/edit/main/solution/3400-3499/3498.Reverse%20Degree%20of%20a%20String/README_EN.md
---

<!-- problem:start -->

# [3498. Reverse Degree of a String](https://leetcode.com/problems/reverse-degree-of-a-string)

[中文文档](/solution/3400-3499/3498.Reverse%20Degree%20of%20a%20String/README.md)

## Description

<!-- description:start -->

<p>Given a string <code>s</code>, calculate its <strong>reverse degree</strong>.</p>

<p>The <strong>reverse degree</strong> is calculated as follows:</p>

<ol>
<li>For each character, multiply its position in the <em>reversed</em> alphabet (<code>&#39;a&#39;</code> = 26, <code>&#39;b&#39;</code> = 25, ..., <code>&#39;z&#39;</code> = 1) with its position in the string <strong>(1-indexed)</strong>.</li>
<li>Sum these products for all characters in the string.</li>
</ol>

<p>Return the <strong>reverse degree</strong> of <code>s</code>.</p>

<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>

<div class="example-block">
<p><strong>Input:</strong> <span class="example-io">s = &quot;abc&quot;</span></p>

<p><strong>Output:</strong> <span class="example-io">148</span></p>

<p><strong>Explanation:</strong></p>

<table style="border: 1px solid black;">
<tbody>
<tr>
<th style="border: 1px solid black;">Letter</th>
<th style="border: 1px solid black;">Index in Reversed Alphabet</th>
<th style="border: 1px solid black;">Index in String</th>
<th style="border: 1px solid black;">Product</th>
</tr>
<tr>
<td style="border: 1px solid black;"><code>&#39;a&#39;</code></td>
<td style="border: 1px solid black;">26</td>
<td style="border: 1px solid black;">1</td>
<td style="border: 1px solid black;">26</td>
</tr>
<tr>
<td style="border: 1px solid black;"><code>&#39;b&#39;</code></td>
<td style="border: 1px solid black;">25</td>
<td style="border: 1px solid black;">2</td>
<td style="border: 1px solid black;">50</td>
</tr>
<tr>
<td style="border: 1px solid black;"><code>&#39;c&#39;</code></td>
<td style="border: 1px solid black;">24</td>
<td style="border: 1px solid black;">3</td>
<td style="border: 1px solid black;">72</td>
</tr>
</tbody>
</table>

<p>The reversed degree is <code>26 + 50 + 72 = 148</code>.</p>
</div>

<p><strong class="example">Example 2:</strong></p>

<div class="example-block">
<p><strong>Input:</strong> <span class="example-io">s = &quot;zaza&quot;</span></p>

<p><strong>Output:</strong> <span class="example-io">160</span></p>

<p><strong>Explanation:</strong></p>

<table style="border: 1px solid black;">
<tbody>
<tr>
<th style="border: 1px solid black;">Letter</th>
<th style="border: 1px solid black;">Index in Reversed Alphabet</th>
<th style="border: 1px solid black;">Index in String</th>
<th style="border: 1px solid black;">Product</th>
</tr>
<tr>
<td style="border: 1px solid black;"><code>&#39;z&#39;</code></td>
<td style="border: 1px solid black;">1</td>
<td style="border: 1px solid black;">1</td>
<td style="border: 1px solid black;">1</td>
</tr>
<tr>
<td style="border: 1px solid black;"><code>&#39;a&#39;</code></td>
<td style="border: 1px solid black;">26</td>
<td style="border: 1px solid black;">2</td>
<td style="border: 1px solid black;">52</td>
</tr>
<tr>
<td style="border: 1px solid black;"><code>&#39;z&#39;</code></td>
<td style="border: 1px solid black;">1</td>
<td style="border: 1px solid black;">3</td>
<td style="border: 1px solid black;">3</td>
</tr>
<tr>
<td style="border: 1px solid black;"><code>&#39;a&#39;</code></td>
<td style="border: 1px solid black;">26</td>
<td style="border: 1px solid black;">4</td>
<td style="border: 1px solid black;">104</td>
</tr>
</tbody>
</table>

<p>The reverse degree is <code>1 + 52 + 3 + 104 = 160</code>.</p>
</div>

<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>

<ul>
<li><code>1 &lt;= s.length &lt;= 1000</code></li>
<li><code>s</code> contains only lowercase English letters.</li>
</ul>

<!-- description:end -->

## Solutions

<!-- solution:start -->

### Solution 1

<!-- tabs:start -->

#### Python3

```python

```

#### Java

```java

```

#### C++

```cpp

```

#### Go

```go

```

<!-- tabs:end -->

<!-- solution:end -->

<!-- problem:end -->
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