Class Solution
java.lang.Object
g2001_2100.s2053_kth_distinct_string_in_an_array.Solution
2053 - Kth Distinct String in an Array.<p>Easy</p>
<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>""</code>.</p>
<p>Note that the strings are considered in the <strong>order in which they appear</strong> in the array.</p>
<p><strong>Example 1:</strong></p>
<p><strong>Input:</strong> arr = [“d”,“b”,“c”,“b”,“c”,“a”], k = 2</p>
<p><strong>Output:</strong> “a”</p>
<p><strong>Explanation:</strong></p>
<p>The only distinct strings in arr are “d” and “a”.</p>
<p>“d” appears 1<sup>st</sup>, so it is the 1<sup>st</sup> distinct string.</p>
<p>“a” appears 2<sup>nd</sup>, so it is the 2<sup>nd</sup> distinct string.</p>
<p>Since k == 2, “a” is returned.</p>
<p><strong>Example 2:</strong></p>
<p><strong>Input:</strong> arr = [“aaa”,“aa”,“a”], k = 1</p>
<p><strong>Output:</strong> “aaa”</p>
<p><strong>Explanation:</strong></p>
<p>All strings in arr are distinct, so the 1<sup>st</sup> string “aaa” is returned.</p>
<p><strong>Example 3:</strong></p>
<p><strong>Input:</strong> arr = [“a”,“b”,“a”], k = 3</p>
<p><strong>Output:</strong> ""</p>
<p><strong>Explanation:</strong> The only distinct string is “b”. Since there are fewer than 3 distinct strings, we return an empty string "".</p>
<p><strong>Constraints:</strong></p>
<ul>
<li><code>1 <= k <= arr.length <= 1000</code></li>
<li><code>1 <= arr[i].length <= 5</code></li>
<li><code>arr[i]</code> consists of lowercase English letters.</li>
</ul>
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Solution
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kthDistinct
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