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算法题（国外版）/word-pattern.html Normal file
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<p>Given a <code>pattern</code> and a string <code>s</code>, find if <code>s</code>&nbsp;follows the same pattern.</p>
<p>Here <b>follow</b> means a full match, such that there is a bijection between a letter in <code>pattern</code> and a <b>non-empty</b> word in <code>s</code>.</p>
<p>&nbsp;</p>
<p><strong>Example 1:</strong></p>
<pre>
<strong>Input:</strong> pattern = &quot;abba&quot;, s = &quot;dog cat cat dog&quot;
<strong>Output:</strong> true
</pre>
<p><strong>Example 2:</strong></p>
<pre>
<strong>Input:</strong> pattern = &quot;abba&quot;, s = &quot;dog cat cat fish&quot;
<strong>Output:</strong> false
</pre>
<p><strong>Example 3:</strong></p>
<pre>
<strong>Input:</strong> pattern = &quot;aaaa&quot;, s = &quot;dog cat cat dog&quot;
<strong>Output:</strong> false
</pre>
<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>
<ul>
<li><code>1 &lt;= pattern.length &lt;= 300</code></li>
<li><code>pattern</code> contains only lower-case English letters.</li>
<li><code>1 &lt;= s.length &lt;= 3000</code></li>
<li><code>s</code> contains only lowercase English letters and spaces <code>&#39; &#39;</code>.</li>
<li><code>s</code> <strong>does not contain</strong> any leading or trailing spaces.</li>
<li>All the words in <code>s</code> are separated by a <strong>single space</strong>.</li>
</ul>