maximum-number-of-words-you-can-type

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Algorithms

There is a malfunctioning keyboard where some letter keys do not work. All other keys on the keyboard work properly.

Given a string <code>text</code> of words separated by a single space (no leading or trailing spaces) and a string <code>brokenLetters</code> of all distinct letter keys that are broken, return the number of words in <code>text</code> you can fully type using this keyboard.

&nbsp;
Example 1:

<pre>
Input: text = &quot;hello world&quot;, brokenLetters = &quot;ad&quot;
Output: 1
Explanation: We cannot type &quot;world&quot; because the &#39;d&#39; key is broken.
</pre>

Example 2:

<pre>
Input: text = &quot;leet code&quot;, brokenLetters = &quot;lt&quot;
Output: 1
Explanation: We cannot type &quot;leet&quot; because the &#39;l&#39; and &#39;t&#39; keys are broken.
</pre>

Example 3:

<pre>
Input: text = &quot;leet code&quot;, brokenLetters = &quot;e&quot;
Output: 0
Explanation: We cannot type either word because the &#39;e&#39; key is broken.
</pre>

&nbsp;
Constraints:

<ul>
	<li><code>1 &lt;= text.length &lt;= 104</code></li>
	<li><code>0 &lt;= brokenLetters.length &lt;= 26</code></li>
	<li><code>text</code> consists of words separated by a single space without any leading or trailing spaces.</li>
	<li>Each word only consists of lowercase English letters.</li>
	<li><code>brokenLetters</code> consists of distinct lowercase English letters.</li>
</ul>

canBeTypedWords

Maximum Number of Words You Can Type

Hash Table

String

键盘出现了一些故障，有些字母键无法正常工作。而键盘上所有其他键都能够正常工作。

给你一个由若干单词组成的字符串 <code>text</code> ，单词间由单个空格组成（不含前导和尾随空格）；另有一个字符串 <code>brokenLetters</code> ，由所有已损坏的不同字母键组成，返回你可以使用此键盘完全输入的 <code>text</code> 中单词的数目。

 

示例 1：

<pre>输入：text = "hello world", brokenLetters = "ad"
输出：1
解释：无法输入 "world" ，因为字母键 'd' 已损坏。
</pre>

示例 2：

<pre>输入：text = "leet code", brokenLetters = "lt"
输出：1
解释：无法输入 "leet" ，因为字母键 'l' 和 't' 已损坏。
</pre>

示例 3：

<pre>输入：text = "leet code", brokenLetters = "e"
输出：0
解释：无法输入任何单词，因为字母键 'e' 已损坏。
</pre>

 

提示：

<ul>
	<li><code>1 &lt;= text.length &lt;= 104</code></li>
	<li><code>0 &lt;= brokenLetters.length &lt;= 26</code></li>
	<li><code>text</code> 由若干用单个空格分隔的单词组成，且不含任何前导和尾随空格</li>
	<li>每个单词仅由小写英文字母组成</li>
	<li><code>brokenLetters</code> 由 互不相同 的小写英文字母组成</li>
</ul>