longest-uncommon-subsequence-ii

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Algorithms

Given an array of strings <code>strs</code>, return the length of the longest uncommon subsequence between them. If the longest uncommon subsequence does not exist, return <code>-1</code>.

An uncommon subsequence between an array of strings is a string that is a subsequence of one string but not the others.

A subsequence of a string <code>s</code> is a string that can be obtained after deleting any number of characters from <code>s</code>.

<ul>
	<li>For example, <code>&quot;abc&quot;</code> is a subsequence of <code>&quot;aebdc&quot;</code> because you can delete the underlined characters in <code>&quot;aebdc&quot;</code> to get <code>&quot;abc&quot;</code>. Other subsequences of <code>&quot;aebdc&quot;</code> include <code>&quot;aebdc&quot;</code>, <code>&quot;aeb&quot;</code>, and <code>&quot;&quot;</code> (empty string).</li>
</ul>

&nbsp;
Example 1:
<pre>Input: strs = ["aba","cdc","eae"]
Output: 3
</pre>Example 2:
<pre>Input: strs = ["aaa","aaa","aa"]
Output: -1
</pre>
&nbsp;
Constraints:

<ul>
	<li><code>2 &lt;= strs.length &lt;= 50</code></li>
	<li><code>1 &lt;= strs[i].length &lt;= 10</code></li>
	<li><code>strs[i]</code> consists of lowercase English letters.</li>
</ul>

findLUSlength

Longest Uncommon Subsequence II

Longest Uncommon Subsequence I

longest-uncommon-subsequence-i

最长特殊序列 Ⅰ

Array

Hash Table

Two Pointers

String

Sorting

给定字符串列表&nbsp;<code>strs</code> ，返回其中 最长的特殊序列&nbsp;的长度。如果最长特殊序列不存在，返回 <code>-1</code> 。

特殊序列 定义如下：该序列为某字符串 独有的子序列（即不能是其他字符串的子序列）。

&nbsp;<code>s</code>&nbsp;的&nbsp;子序列可以通过删去字符串&nbsp;<code>s</code>&nbsp;中的某些字符实现。

<ul>
	<li>例如，<code>"abc"</code>&nbsp;是 <code>"aebdc"</code>&nbsp;的子序列，因为您可以删除<code>"aebdc"</code>中的下划线字符来得到 <code>"abc"</code>&nbsp;。<code>"aebdc"</code>的子序列还包括<code>"aebdc"</code>、 <code>"aeb"</code>&nbsp;和 ""&nbsp;(空字符串)。</li>
</ul>

&nbsp;

示例 1：

<pre>
输入: strs = ["aba","cdc","eae"]
输出: 3
</pre>

示例 2:

<pre>
输入: strs = ["aaa","aaa","aa"]
输出: -1
</pre>

&nbsp;

提示:

<ul>
	<li><code>2 &lt;= strs.length &lt;= 50</code></li>
	<li><code>1 &lt;= strs[i].length &lt;= 10</code></li>
	<li><code>strs[i]</code>&nbsp;只包含小写英文字母</li>
</ul>