leetcode-problemset/leetcode-cn/originData/longest-uncommon-subsequence-i.json

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            "title": "Longest Uncommon Subsequence I",
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            "content": "<p>Given two strings <code>a</code> and <code>b</code>, return <em>the length of the <strong>longest uncommon subsequence</strong> between </em><code>a</code> <em>and</em> <code>b</code>. If the longest uncommon subsequence does not exist, return <code>-1</code>.</p>\n\n<p>An <strong>uncommon subsequence</strong> between two strings is a string that is a <strong>subsequence of one but not the other</strong>.</p>\n\n<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>\n\n<ul>\n\t<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;a<u>e</u>b<u>d</u>c&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>\n</ul>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> a = &quot;aba&quot;, b = &quot;cdc&quot;\n<strong>Output:</strong> 3\n<strong>Explanation:</strong> One longest uncommon subsequence is &quot;aba&quot; because &quot;aba&quot; is a subsequence of &quot;aba&quot; but not &quot;cdc&quot;.\nNote that &quot;cdc&quot; is also a longest uncommon subsequence.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> a = &quot;aaa&quot;, b = &quot;bbb&quot;\n<strong>Output:</strong> 3\n<strong>Explanation:</strong>&nbsp;The longest uncommon subsequences are &quot;aaa&quot; and &quot;bbb&quot;.\n</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> a = &quot;aaa&quot;, b = &quot;aaa&quot;\n<strong>Output:</strong> -1\n<strong>Explanation:</strong>&nbsp;Every subsequence of string a is also a subsequence of string b. Similarly, every subsequence of string b is also a subsequence of string a.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= a.length, b.length &lt;= 100</code></li>\n\t<li><code>a</code> and <code>b</code> consist of lower-case English letters.</li>\n</ul>\n",
            "translatedTitle": "最长特殊序列 Ⅰ",
            "translatedContent": "<p>给你两个字符串&nbsp;<code>a</code>&nbsp;和&nbsp;<code>b</code>，请返回 <em>这两个字符串中 <strong>最长的特殊序列</strong>&nbsp;</em> 的长度。如果不存在，则返回 <code>-1</code>&nbsp;。</p>\n\n<p><strong>「最长特殊序列」</strong>&nbsp;定义如下：该序列为&nbsp;<strong>某字符串独有的最长子序列（即不能是其他字符串的子序列）</strong>&nbsp;。</p>\n\n<p>字符串&nbsp;<code>s</code>&nbsp;的子序列是在从&nbsp;<code>s</code>&nbsp;中删除任意数量的字符后可以获得的字符串。</p>\n\n<ul>\n\t<li>例如，<code>\"abc\"</code> 是 <code>\"aebdc\"</code> 的子序列，因为删除 <code>\"a<em><strong>e</strong></em>b<strong><em>d</em></strong>c\"</code> 中斜体加粗的字符可以得到 <code>\"abc\"</code> 。 <code>\"aebdc\"</code> 的子序列还包括 <code>\"aebdc\"</code> 、 <code>\"aeb\"</code> 和 <code>\"\"</code> (空字符串)。</li>\n</ul>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre>\n<strong>输入:</strong> a = \"aba\", b = \"cdc\"\n<strong>输出:</strong> 3\n<strong>解释:</strong> 最长特殊序列可为 \"aba\" (或 \"cdc\")，两者均为自身的子序列且不是对方的子序列。</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre>\n<strong>输入：</strong>a = \"aaa\", b = \"bbb\"\n<strong>输出：</strong>3\n<strong>解释:</strong> 最长特殊序列是 \"aaa\" 和 \"bbb\" 。\n</pre>\n\n<p><strong>示例 3：</strong></p>\n\n<pre>\n<strong>输入：</strong>a = \"aaa\", b = \"aaa\"\n<strong>输出：</strong>-1\n<strong>解释:</strong> 字符串 a 的每个子序列也是字符串 b 的每个子序列。同样，字符串 b 的每个子序列也是字符串 a 的子序列。\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= a.length, b.length &lt;= 100</code></li>\n\t<li><code>a</code>&nbsp;和&nbsp;<code>b</code>&nbsp;由小写英文字母组成</li>\n</ul>\n",
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