leetcode-problemset/leetcode-cn/originData/check-if-word-is-valid-after-substitutions.json

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            "title": "Check If Word Is Valid After Substitutions",
            "titleSlug": "check-if-word-is-valid-after-substitutions",
            "content": "<p>Given a string <code>s</code>, determine if it is <strong>valid</strong>.</p>\n\n<p>A string <code>s</code> is <strong>valid</strong> if, starting with an empty string <code>t = &quot;&quot;</code>, you can <strong>transform </strong><code>t</code><strong> into </strong><code>s</code> after performing the following operation <strong>any number of times</strong>:</p>\n\n<ul>\n\t<li>Insert string <code>&quot;abc&quot;</code> into any position in <code>t</code>. More formally, <code>t</code> becomes <code>t<sub>left</sub> + &quot;abc&quot; + t<sub>right</sub></code>, where <code>t == t<sub>left</sub> + t<sub>right</sub></code>. Note that <code>t<sub>left</sub></code> and <code>t<sub>right</sub></code> may be <strong>empty</strong>.</li>\n</ul>\n\n<p>Return <code>true</code> <em>if </em><code>s</code><em> is a <strong>valid</strong> string, otherwise, return</em> <code>false</code>.</p>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;aabcbc&quot;\n<strong>Output:</strong> true\n<strong>Explanation:</strong>\n&quot;&quot; -&gt; &quot;<u>abc</u>&quot; -&gt; &quot;a<u>abc</u>bc&quot;\nThus, &quot;aabcbc&quot; is valid.</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;abcabcababcc&quot;\n<strong>Output:</strong> true\n<strong>Explanation:</strong>\n&quot;&quot; -&gt; &quot;<u>abc</u>&quot; -&gt; &quot;abc<u>abc</u>&quot; -&gt; &quot;abcabc<u>abc</u>&quot; -&gt; &quot;abcabcab<u>abc</u>c&quot;\nThus, &quot;abcabcababcc&quot; is valid.\n</pre>\n\n<p><strong>Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;abccba&quot;\n<strong>Output:</strong> false\n<strong>Explanation:</strong> It is impossible to get &quot;abccba&quot; using the operation.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= s.length &lt;= 2 * 10<sup>4</sup></code></li>\n\t<li><code>s</code> consists of letters <code>&#39;a&#39;</code>, <code>&#39;b&#39;</code>, and <code>&#39;c&#39;</code></li>\n</ul>\n",
            "translatedTitle": "检查替换后的词是否有效",
            "translatedContent": "给你一个字符串 <code>s</code> ，请你判断它是否 <strong>有效</strong> 。\n<p>字符串 <code>s</code> <strong>有效</strong> 需要满足：假设开始有一个空字符串 <code>t = \"\"</code> ，你可以执行 <strong>任意次</strong> 下述操作将<strong> </strong><code>t</code><strong> 转换为 </strong><code>s</code> ：</p>\n\n<ul>\n\t<li>将字符串 <code>\"abc\"</code> 插入到 <code>t</code> 中的任意位置。形式上，<code>t</code> 变为 <code>t<sub>left</sub> + \"abc\" + t<sub>right</sub></code>，其中 <code>t == t<sub>left</sub> + t<sub>right</sub></code> 。注意，<code>t<sub>left</sub></code> 和 <code>t<sub>right</sub></code> 可能为 <strong>空</strong> 。</li>\n</ul>\n\n<p>如果字符串 <code>s</code> 有效，则返回 <code>true</code>；否则，返回 <code>false</code>。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre>\n<strong>输入：</strong>s = \"aabcbc\"\n<strong>输出：</strong>true\n<strong>解释：</strong>\n\"\" -&gt; \"<strong>abc</strong>\" -&gt; \"a<strong>abc</strong>bc\"\n因此，\"aabcbc\" 有效。</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre>\n<strong>输入：</strong>s = \"abcabcababcc\"\n<strong>输出：</strong>true\n<strong>解释：</strong>\n\"\" -&gt; \"<strong>abc</strong>\" -&gt; \"abc<strong>abc</strong>\" -&gt; \"abcabc<strong>abc</strong>\" -&gt; \"abcabcab<strong>abc</strong>c\"\n因此，\"abcabcababcc\" 有效。</pre>\n\n<p><strong>示例 3：</strong></p>\n\n<pre>\n<strong>输入：</strong>s = \"abccba\"\n<strong>输出：</strong>false\n<strong>解释：</strong>执行操作无法得到 \"abccba\" 。</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= s.length &lt;= 2 * 10<sup>4</sup></code></li>\n\t<li><code>s</code> 由字母 <code>'a'</code>、<code>'b'</code> 和 <code>'c'</code> 组成</li>\n</ul>\n",
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