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leetcode-problemset/leetcode-cn/originData/find-the-closest-palindrome.json

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{
"data": {
"question": {
"questionId": "564",
"questionFrontendId": "564",
"categoryTitle": "Algorithms",
"boundTopicId": 1524,
"title": "Find the Closest Palindrome",
"titleSlug": "find-the-closest-palindrome",
"content": "<p>Given a string <code>n</code> representing an integer, return <em>the closest integer (not including itself), which is a palindrome</em>. If there is a tie, return <em><strong>the smaller one</strong></em>.</p>\n\n<p>The closest is defined as the absolute difference minimized between two integers.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> n = &quot;123&quot;\n<strong>Output:</strong> &quot;121&quot;\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> n = &quot;1&quot;\n<strong>Output:</strong> &quot;0&quot;\n<strong>Explanation:</strong> 0 and 2 are the closest palindromes but we return the smallest which is 0.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= n.length &lt;= 18</code></li>\n\t<li><code>n</code> consists of only digits.</li>\n\t<li><code>n</code> does not have leading zeros.</li>\n\t<li><code>n</code> is representing an integer in the range <code>[1, 10<sup>18</sup> - 1]</code>.</li>\n</ul>\n",
"translatedTitle": "寻找最近的回文数",
"translatedContent": "<p>给定一个表示整数的字符串&nbsp;<code>n</code> ,返回与它最近的回文整数(不包括自身)。如果不止一个,返回较小的那个。</p>\n\n<p>“最近的”定义为两个整数<strong>差的绝对值</strong>最小。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1:</strong></p>\n\n<pre>\n<strong>输入:</strong> n = \"123\"\n<strong>输出:</strong> \"121\"\n</pre>\n\n<p><strong>示例 2:</strong></p>\n\n<pre>\n<strong>输入:</strong> n = \"1\"\n<strong>输出:</strong> \"0\"\n<strong>解释:</strong> 0 和 2是最近的回文但我们返回最小的也就是 0。\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= n.length &lt;= 18</code></li>\n\t<li><code>n</code>&nbsp;只由数字组成</li>\n\t<li><code>n</code>&nbsp;不含前导 0</li>\n\t<li><code>n</code>&nbsp;代表在&nbsp;<code>[1, 10<sup>18</sup>&nbsp;- 1]</code> 范围内的整数</li>\n</ul>\n",
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"code": "class Solution {\npublic:\n string nearestPalindromic(string n) {\n\n }\n};",
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"code": "class Solution(object):\n def nearestPalindromic(self, n):\n \"\"\"\n :type n: str\n :rtype: str\n \"\"\"",
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"code": "defmodule Solution do\n @spec nearest_palindromic(n :: String.t) :: String.t\n def nearest_palindromic(n) do\n \n end\nend",
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"hints": [
"Will brute force work for this problem? Think of something else.",
"Take some examples like 1234, 999,1000, etc and check their closest palindromes. How many different cases are possible?",
"Do we have to consider only left half or right half of the string or both?",
"Try to find the closest palindrome of these numbers- 12932, 99800, 12120. Did you observe something?"
],
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"sampleTestCase": "\"123\"",
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