# 两数之和

<p>给定字符串 <code>S</code> 和单词字典 <code>words</code>, 求&nbsp;<code>words[i]</code>&nbsp;中是&nbsp;<code>S</code>&nbsp;的子序列的单词个数。</p>

<pre>
<strong>示例:</strong>
<strong>输入:</strong> 
S = &quot;abcde&quot;
words = [&quot;a&quot;, &quot;bb&quot;, &quot;acd&quot;, &quot;ace&quot;]
<strong>输出:</strong> 3
<strong>解释:</strong> 有三个是&nbsp;S 的子序列的单词: &quot;a&quot;, &quot;acd&quot;, &quot;ace&quot;。
</pre>

<p><strong>注意:</strong></p>

<ul>
	<li>所有在<code>words</code>和&nbsp;<code>S</code>&nbsp;里的单词都只由小写字母组成。</li>
	<li><code>S</code> 的长度在&nbsp;<code>[1, 50000]</code>。</li>
	<li><code>words</code>&nbsp;的长度在&nbsp;<code>[1, 5000]</code>。</li>
	<li><code>words[i]</code>的长度在<code>[1, 50]</code>。</li>
</ul>

<p>以下错误的选项是？</p>

## aop
### before
```cpp

```
### after
```cpp

```

## 答案
```cpp

```
## 选项

### A
```cpp

```

### B
```cpp

```

### C
```cpp

```
