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27 lines
1.5 KiB
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27 lines
1.5 KiB
HTML
<p>Given an array of strings <code>strs</code>, return <em>the length of the <strong>longest uncommon subsequence</strong> between them</em>. If the longest uncommon subsequence does not exist, return <code>-1</code>.</p>
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<p>An <strong>uncommon subsequence</strong> between an array of strings is a string that is a <strong>subsequence of one string but not the others</strong>.</p>
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<p>A <strong>subsequence</strong> of a string <code>s</code> is a string that can be obtained after deleting any number of characters from <code>s</code>.</p>
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<ul>
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<li>For example, <code>"abc"</code> is a subsequence of <code>"aebdc"</code> because you can delete the underlined characters in <code>"a<u>e</u>b<u>d</u>c"</code> to get <code>"abc"</code>. Other subsequences of <code>"aebdc"</code> include <code>"aebdc"</code>, <code>"aeb"</code>, and <code>""</code> (empty string).</li>
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</ul>
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<p> </p>
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<p><strong class="example">Example 1:</strong></p>
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<pre><strong>Input:</strong> strs = ["aba","cdc","eae"]
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<strong>Output:</strong> 3
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</pre><p><strong class="example">Example 2:</strong></p>
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<pre><strong>Input:</strong> strs = ["aaa","aaa","aa"]
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<strong>Output:</strong> -1
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</pre>
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<p> </p>
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<p><strong>Constraints:</strong></p>
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<ul>
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<li><code>2 <= strs.length <= 50</code></li>
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<li><code>1 <= strs[i].length <= 10</code></li>
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<li><code>strs[i]</code> consists of lowercase English letters.</li>
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</ul>
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