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leetcode/1781-check-if-two-string-arrays-are-equivalent/README.md

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+<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 class="example">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 class="example">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 class="example">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>

leetcode/1781-check-if-two-string-arrays-are-equivalent/solution.py

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+class Solution(object):
+    def arrayStringsAreEqual(self, word1, word2):
+        """
+        :type word1: List[str]
+        :type word2: List[str]
+        :rtype: bool
+        """
+        def add_func(words):
+            res = ''
+            for word in words:
+                res += word
+            return res
+            
+        ans1 = add_func(word1)
+        ans2 = add_func(word2)
+        return ans1 == ans2
+