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leetcode-problemset/leetcode/originData/maximize-palindrome-length-from-subsequences.json
2023-12-09 19:57:46 +08:00

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{
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"title": "Maximize Palindrome Length From Subsequences",
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"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",
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"exampleTestcases": "\"cacb\"\n\"cbba\"\n\"ab\"\n\"ab\"\n\"aa\"\n\"bb\"",
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"code": "class Solution(object):\n def longestPalindrome(self, word1, word2):\n \"\"\"\n :type word1: str\n :type word2: str\n :rtype: int\n \"\"\"\n ",
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"code": "/**\n * @param {string} word1\n * @param {string} word2\n * @return {number}\n */\nvar longestPalindrome = function(word1, word2) {\n \n};",
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"code": "class Solution {\n\n /**\n * @param String $word1\n * @param String $word2\n * @return Integer\n */\n function longestPalindrome($word1, $word2) {\n \n }\n}",
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"code": "# @param {String} word1\n# @param {String} word2\n# @return {Integer}\ndef longest_palindrome(word1, word2)\n \nend",
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"code": "defmodule Solution do\n @spec longest_palindrome(word1 :: String.t, word2 :: String.t) :: integer\n def longest_palindrome(word1, word2) do\n \n end\nend",
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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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"sampleTestCase": "\"cacb\"\n\"cbba\"",
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