leetcode-problemset/leetcode/problem/check-if-two-string-arrays-are-equivalent.html

<p>Given two string arrays <code>word1</code> and <code>word2</code>, return<em> </em><code>true</code><em> if the two arrays <strong>represent</strong> the same string, and </em><code>false</code><em> otherwise.</em></p>

<p>A string is <strong>represented</strong> by an array if the array elements concatenated <strong>in order</strong> forms the string.</p>

<p>&nbsp;</p>
<p><strong>Example 1:</strong></p>

<pre>
<strong>Input:</strong> word1 = [&quot;ab&quot;, &quot;c&quot;], word2 = [&quot;a&quot;, &quot;bc&quot;]
<strong>Output:</strong> true
<strong>Explanation:</strong>
word1 represents string &quot;ab&quot; + &quot;c&quot; -&gt; &quot;abc&quot;
word2 represents string &quot;a&quot; + &quot;bc&quot; -&gt; &quot;abc&quot;
The strings are the same, so return true.</pre>

<p><strong>Example 2:</strong></p>

<pre>
<strong>Input:</strong> word1 = [&quot;a&quot;, &quot;cb&quot;], word2 = [&quot;ab&quot;, &quot;c&quot;]
<strong>Output:</strong> false
</pre>

<p><strong>Example 3:</strong></p>

<pre>
<strong>Input:</strong> word1  = [&quot;abc&quot;, &quot;d&quot;, &quot;defg&quot;], word2 = [&quot;abcddefg&quot;]
<strong>Output:</strong> true
</pre>

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

<ul>
	<li><code>1 &lt;= word1.length, word2.length &lt;= 10<sup>3</sup></code></li>
	<li><code>1 &lt;= word1[i].length, word2[i].length &lt;= 10<sup>3</sup></code></li>
	<li><code>1 &lt;= sum(word1[i].length), sum(word2[i].length) &lt;= 10<sup>3</sup></code></li>
	<li><code>word1[i]</code> and <code>word2[i]</code> consist of lowercase letters.</li>
</ul>