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30 lines
1.0 KiB
HTML
30 lines
1.0 KiB
HTML
<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>
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<p>The closest is defined as the absolute difference minimized between two integers.</p>
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<p> </p>
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<p><strong class="example">Example 1:</strong></p>
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<pre>
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<strong>Input:</strong> n = "123"
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<strong>Output:</strong> "121"
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</pre>
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<p><strong class="example">Example 2:</strong></p>
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<pre>
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<strong>Input:</strong> n = "1"
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<strong>Output:</strong> "0"
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<strong>Explanation:</strong> 0 and 2 are the closest palindromes but we return the smallest which is 0.
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</pre>
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<p> </p>
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<p><strong>Constraints:</strong></p>
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<ul>
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<li><code>1 <= n.length <= 18</code></li>
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<li><code>n</code> consists of only digits.</li>
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<li><code>n</code> does not have leading zeros.</li>
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<li><code>n</code> is representing an integer in the range <code>[1, 10<sup>18</sup> - 1]</code>.</li>
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</ul>
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