leetcode-problemset/leetcode-cn/originData/longest-string-chain.json

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        "question": {
            "questionId": "1129",
            "questionFrontendId": "1048",
            "categoryTitle": "Algorithms",
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            "title": "Longest String Chain",
            "titleSlug": "longest-string-chain",
            "content": "<p>You are given an array of <code>words</code> where each word consists of lowercase English letters.</p>\n\n<p><code>word<sub>A</sub></code> is a <strong>predecessor</strong> of <code>word<sub>B</sub></code> if and only if we can insert <strong>exactly one</strong> letter anywhere in <code>word<sub>A</sub></code> <strong>without changing the order of the other characters</strong> to make it equal to <code>word<sub>B</sub></code>.</p>\n\n<ul>\n\t<li>For example, <code>&quot;abc&quot;</code> is a <strong>predecessor</strong> of <code>&quot;ab<u>a</u>c&quot;</code>, while <code>&quot;cba&quot;</code> is not a <strong>predecessor</strong> of <code>&quot;bcad&quot;</code>.</li>\n</ul>\n\n<p>A <strong>word chain</strong><em> </em>is a sequence of words <code>[word<sub>1</sub>, word<sub>2</sub>, ..., word<sub>k</sub>]</code> with <code>k &gt;= 1</code>, where <code>word<sub>1</sub></code> is a <strong>predecessor</strong> of <code>word<sub>2</sub></code>, <code>word<sub>2</sub></code> is a <strong>predecessor</strong> of <code>word<sub>3</sub></code>, and so on. A single word is trivially a <strong>word chain</strong> with <code>k == 1</code>.</p>\n\n<p>Return <em>the <strong>length</strong> of the <strong>longest possible word chain</strong> with words chosen from the given list of </em><code>words</code>.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> words = [&quot;a&quot;,&quot;b&quot;,&quot;ba&quot;,&quot;bca&quot;,&quot;bda&quot;,&quot;bdca&quot;]\n<strong>Output:</strong> 4\n<strong>Explanation</strong>: One of the longest word chains is [&quot;a&quot;,&quot;<u>b</u>a&quot;,&quot;b<u>d</u>a&quot;,&quot;bd<u>c</u>a&quot;].\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> words = [&quot;xbc&quot;,&quot;pcxbcf&quot;,&quot;xb&quot;,&quot;cxbc&quot;,&quot;pcxbc&quot;]\n<strong>Output:</strong> 5\n<strong>Explanation:</strong> All the words can be put in a word chain [&quot;xb&quot;, &quot;xb<u>c</u>&quot;, &quot;<u>c</u>xbc&quot;, &quot;<u>p</u>cxbc&quot;, &quot;pcxbc<u>f</u>&quot;].\n</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> words = [&quot;abcd&quot;,&quot;dbqca&quot;]\n<strong>Output:</strong> 1\n<strong>Explanation:</strong> The trivial word chain [&quot;abcd&quot;] is one of the longest word chains.\n[&quot;abcd&quot;,&quot;dbqca&quot;] is not a valid word chain because the ordering of the letters is changed.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= words.length &lt;= 1000</code></li>\n\t<li><code>1 &lt;= words[i].length &lt;= 16</code></li>\n\t<li><code>words[i]</code> only consists of lowercase English letters.</li>\n</ul>\n",
            "translatedTitle": "最长字符串链",
            "translatedContent": "<p>给出一个单词数组&nbsp;<code>words</code>&nbsp;，其中每个单词都由小写英文字母组成。</p>\n\n<p>如果我们可以&nbsp;<strong>不改变其他字符的顺序&nbsp;</strong>，在 <code>word<sub>A</sub></code>&nbsp;的任何地方添加 <strong>恰好一个</strong> 字母使其变成&nbsp;<code>word<sub>B</sub></code>&nbsp;，那么我们认为&nbsp;<code>word<sub>A</sub></code>&nbsp;是&nbsp;<code>word<sub>B</sub></code>&nbsp;的 <strong>前身</strong> 。</p>\n\n<ul>\n\t<li>例如，<code>\"abc\"</code>&nbsp;是&nbsp;<code>\"abac\"</code>&nbsp;的 <strong>前身</strong>&nbsp;，而&nbsp;<code>\"cba\"</code>&nbsp;不是&nbsp;<code>\"bcad\"</code>&nbsp;的 <strong>前身</strong></li>\n</ul>\n\n<p><strong>词链</strong>是单词&nbsp;<code>[word_1, word_2, ..., word_k]</code>&nbsp;组成的序列，<code>k &gt;= 1</code>，其中&nbsp;<code>word<sub>1</sub></code>&nbsp;是&nbsp;<code>word<sub>2</sub></code>&nbsp;的前身，<code>word<sub>2</sub></code>&nbsp;是&nbsp;<code>word<sub>3</sub></code>&nbsp;的前身，依此类推。一个单词通常是 <code>k == 1</code> 的 <strong>单词链</strong>&nbsp;。</p>\n\n<p>从给定单词列表 <code>words</code> 中选择单词组成词链，返回 词链的&nbsp;<strong>最长可能长度</strong> 。<br />\n&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre>\n<strong>输入：</strong>words = [\"a\",\"b\",\"ba\",\"bca\",\"bda\",\"bdca\"]\n<strong>输出：</strong>4\n<strong>解释：</strong>最长单词链之一为 [\"a\",\"<u>b</u>a\",\"b<u>d</u>a\",\"bd<u>c</u>a\"]\n</pre>\n\n<p><strong>示例 2:</strong></p>\n\n<pre>\n<b>输入：</b>words = [\"xbc\",\"pcxbcf\",\"xb\",\"cxbc\",\"pcxbc\"]\n<b>输出：</b>5\n<b>解释：</b>所有的单词都可以放入单词链 [\"xb\", \"xb<u>c</u>\", \"<u>c</u>xbc\", \"<u>p</u>cxbc\", \"pcxbc<u>f</u>\"].\n</pre>\n\n<p><strong>示例&nbsp;3:</strong></p>\n\n<pre>\n<b>输入：</b>words = [\"abcd\",\"dbqca\"]\n<strong>输出：</strong>1\n<b>解释：</b>字链[\"abcd\"]是最长的字链之一。\n[\"abcd\"，\"dbqca\"]不是一个有效的单词链，因为字母的顺序被改变了。\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= words.length &lt;= 1000</code></li>\n\t<li><code>1 &lt;= words[i].length &lt;= 16</code></li>\n\t<li><code>words[i]</code>&nbsp;仅由小写英文字母组成。</li>\n</ul>\n",
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                "Instead of adding a character, try deleting a character to form a chain in reverse.",
                "For each word in order of length, for each word2 which is word with one character removed, length[word2] = max(length[word2], length[word] + 1)."
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