leetcode-problemset/leetcode-cn/originData/maximize-palindrome-length-from-subsequences.json

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        "question": {
            "questionId": "1897",
            "questionFrontendId": "1771",
            "categoryTitle": "Algorithms",
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            "title": "Maximize Palindrome Length From Subsequences",
            "titleSlug": "maximize-palindrome-length-from-subsequences",
            "content": "<p>You are given two strings, <code>word1</code> and <code>word2</code>. You want to construct a string in the following manner:</p>\n\n<ul>\n\t<li>Choose some <strong>non-empty</strong> subsequence <code>subsequence1</code> from <code>word1</code>.</li>\n\t<li>Choose some <strong>non-empty</strong> subsequence <code>subsequence2</code> from <code>word2</code>.</li>\n\t<li>Concatenate the subsequences: <code>subsequence1 + subsequence2</code>, to make the string.</li>\n</ul>\n\n<p>Return <em>the <strong>length</strong> of the longest <strong>palindrome</strong> that can be constructed in the described manner. </em>If no palindromes can be constructed, return <code>0</code>.</p>\n\n<p>A <strong>subsequence</strong> of a string <code>s</code> is a string that can be made by deleting some (possibly none) characters from <code>s</code> without changing the order of the remaining characters.</p>\n\n<p>A <strong>palindrome</strong> is a string that reads the same forward&nbsp;as well as backward.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> word1 = &quot;cacb&quot;, word2 = &quot;cbba&quot;\n<strong>Output:</strong> 5\n<strong>Explanation:</strong> Choose &quot;ab&quot; from word1 and &quot;cba&quot; from word2 to make &quot;abcba&quot;, which is a palindrome.</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> word1 = &quot;ab&quot;, word2 = &quot;ab&quot;\n<strong>Output:</strong> 3\n<strong>Explanation:</strong> Choose &quot;ab&quot; from word1 and &quot;a&quot; from word2 to make &quot;aba&quot;, which is a palindrome.</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> word1 = &quot;aa&quot;, word2 = &quot;bb&quot;\n<strong>Output:</strong> 0\n<strong>Explanation:</strong> You cannot construct a palindrome from the described method, so return 0.</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= word1.length, word2.length &lt;= 1000</code></li>\n\t<li><code>word1</code> and <code>word2</code> consist of lowercase English letters.</li>\n</ul>\n",
            "translatedTitle": "由子序列构造的最长回文串的长度",
            "translatedContent": "<p>给你两个字符串 <code>word1</code> 和 <code>word2</code> ，请你按下述方法构造一个字符串：</p>\n\n<ul>\n\t<li>从 <code>word1</code> 中选出某个 <strong>非空</strong> 子序列 <code>subsequence1</code> 。</li>\n\t<li>从 <code>word2</code> 中选出某个 <strong>非空</strong> 子序列 <code>subsequence2</code> 。</li>\n\t<li>连接两个子序列 <code>subsequence1 + subsequence2</code> ，得到字符串。</li>\n</ul>\n\n<p>返回可按上述方法构造的最长 <strong>回文串</strong> 的 <strong>长度</strong> 。如果无法构造回文串，返回 <code>0</code> 。</p>\n\n<p>字符串 <code>s</code> 的一个 <strong>子序列</strong> 是通过从 <code>s</code> 中删除一些（也可能不删除）字符而不更改其余字符的顺序生成的字符串。</p>\n\n<p><strong>回文串</strong> 是正着读和反着读结果一致的字符串。</p>\n\n<p> </p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre><strong>输入：</strong>word1 = \"cacb\", word2 = \"cbba\"\n<strong>输出：</strong>5\n<strong>解释：</strong>从 word1 中选出 \"ab\" ，从 word2 中选出 \"cba\" ，得到回文串 \"abcba\" 。</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre><strong>输入：</strong>word1 = \"ab\", word2 = \"ab\"\n<strong>输出：</strong>3\n<strong>解释：</strong>从 word1 中选出 \"ab\" ，从 word2 中选出 \"a\" ，得到回文串 \"aba\" 。</pre>\n\n<p><strong>示例 3：</strong></p>\n\n<pre><strong>输入：</strong>word1 = \"aa\", word2 = \"bb\"\n<strong>输出：</strong>0\n<strong>解释：</strong>无法按题面所述方法构造回文串，所以返回 0 。</pre>\n\n<p> </p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= word1.length, word2.length &lt;= 1000</code></li>\n\t<li><code>word1</code> 和 <code>word2</code> 由小写英文字母组成</li>\n</ul>\n",
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                    "code": "class Solution {\npublic:\n    int longestPalindrome(string word1, string word2) {\n\n    }\n};",
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                    "code": "class Solution {\n    func longestPalindrome(_ word1: String, _ word2: String) -> Int {\n\n    }\n}",
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                    "code": "-spec longest_palindrome(Word1 :: unicode:unicode_binary(), Word2 :: unicode:unicode_binary()) -> integer().\nlongest_palindrome(Word1, Word2) ->\n  .",
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            "hints": [
                "Let's ignore the non-empty subsequence constraint. We can concatenate the two strings and find the largest palindromic subsequence with dynamic programming.",
                "Iterate through every pair of characters word1[i] and word2[j], and see if some palindrome begins with word1[i] and ends with word2[j]. This ensures that the subsequences are non-empty."
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