mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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192 lines
17 KiB
JSON
192 lines
17 KiB
JSON
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"content": "<p>Given a string <code>s</code>, find two <strong>disjoint palindromic subsequences</strong> of <code>s</code> such that the <strong>product</strong> of their lengths is <strong>maximized</strong>. The two subsequences are <strong>disjoint</strong> if they do not both pick a character at the same index.</p>\n\n<p>Return <em>the <strong>maximum</strong> possible <strong>product</strong> of the lengths of the two palindromic subsequences</em>.</p>\n\n<p>A <strong>subsequence</strong> is a string that can be derived from another string by deleting some or no characters without changing the order of the remaining characters. A string is <strong>palindromic</strong> if it reads the same forward and backward.</p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n<img alt=\"example-1\" src=\"https://assets.leetcode.com/uploads/2021/08/24/two-palindromic-subsequences.png\" style=\"width: 550px; height: 124px;\" />\n<pre>\n<strong>Input:</strong> s = "leetcodecom"\n<strong>Output:</strong> 9\n<strong>Explanation</strong>: An optimal solution is to choose "ete" for the 1<sup>st</sup> subsequence and "cdc" for the 2<sup>nd</sup> subsequence.\nThe product of their lengths is: 3 * 3 = 9.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = "bb"\n<strong>Output:</strong> 1\n<strong>Explanation</strong>: An optimal solution is to choose "b" (the first character) for the 1<sup>st</sup> subsequence and "b" (the second character) for the 2<sup>nd</sup> subsequence.\nThe product of their lengths is: 1 * 1 = 1.\n</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = "accbcaxxcxx"\n<strong>Output:</strong> 25\n<strong>Explanation</strong>: An optimal solution is to choose "accca" for the 1<sup>st</sup> subsequence and "xxcxx" for the 2<sup>nd</sup> subsequence.\nThe product of their lengths is: 5 * 5 = 25.\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>2 <= s.length <= 12</code></li>\n\t<li><code>s</code> consists of lowercase English letters only.</li>\n</ul>\n",
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"Could you generate all possible pairs of disjoint subsequences?",
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"Could you find the maximum length palindrome in each subsequence for a pair of disjoint subsequences?"
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