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2053-kth-distinct-string-in-an-array/README.md

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+<h2><a href="https://leetcode.com/problems/kth-distinct-string-in-an-array">2053. Kth Distinct String in an Array</a></h2><h3>Easy</h3><hr><p>A <strong>distinct string</strong> is a string that is present only <strong>once</strong> in an array.</p>
+
+<p>Given an array of strings <code>arr</code>, and an integer <code>k</code>, return <em>the </em><code>k<sup>th</sup></code><em> <strong>distinct string</strong> present in </em><code>arr</code>. If there are <strong>fewer</strong> than <code>k</code> distinct strings, return <em>an <strong>empty string </strong></em><code>&quot;&quot;</code>.</p>
+
+<p>Note that the strings are considered in the <strong>order in which they appear</strong> in the array.</p>
+
+<p>&nbsp;</p>
+<p><strong class="example">Example 1:</strong></p>
+
+<pre>
+<strong>Input:</strong> arr = [&quot;d&quot;,&quot;b&quot;,&quot;c&quot;,&quot;b&quot;,&quot;c&quot;,&quot;a&quot;], k = 2
+<strong>Output:</strong> &quot;a&quot;
+<strong>Explanation:</strong>
+The only distinct strings in arr are &quot;d&quot; and &quot;a&quot;.
+&quot;d&quot; appears 1<sup>st</sup>, so it is the 1<sup>st</sup> distinct string.
+&quot;a&quot; appears 2<sup>nd</sup>, so it is the 2<sup>nd</sup> distinct string.
+Since k == 2, &quot;a&quot; is returned. 
+</pre>
+
+<p><strong class="example">Example 2:</strong></p>
+
+<pre>
+<strong>Input:</strong> arr = [&quot;aaa&quot;,&quot;aa&quot;,&quot;a&quot;], k = 1
+<strong>Output:</strong> &quot;aaa&quot;
+<strong>Explanation:</strong>
+All strings in arr are distinct, so the 1<sup>st</sup> string &quot;aaa&quot; is returned.
+</pre>
+
+<p><strong class="example">Example 3:</strong></p>
+
+<pre>
+<strong>Input:</strong> arr = [&quot;a&quot;,&quot;b&quot;,&quot;a&quot;], k = 3
+<strong>Output:</strong> &quot;&quot;
+<strong>Explanation:</strong>
+The only distinct string is &quot;b&quot;. Since there are fewer than 3 distinct strings, we return an empty string &quot;&quot;.
+</pre>
+
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li><code>1 &lt;= k &lt;= arr.length &lt;= 1000</code></li>
+	<li><code>1 &lt;= arr[i].length &lt;= 5</code></li>
+	<li><code>arr[i]</code> consists of lowercase English letters.</li>
+</ul>