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32 lines
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32 lines
1.3 KiB
HTML
<p>Let's say a positive integer is a <strong>super-palindrome</strong> if it is a palindrome, and it is also the square of a palindrome.</p>
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<p>Given two positive integers <code>left</code> and <code>right</code> represented as strings, return <em>the number of <strong>super-palindromes</strong> integers in the inclusive range</em> <code>[left, right]</code>.</p>
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<p> </p>
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<p><strong>Example 1:</strong></p>
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<pre>
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<strong>Input:</strong> left = "4", right = "1000"
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<strong>Output:</strong> 4
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<strong>Explanation</strong>: 4, 9, 121, and 484 are superpalindromes.
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Note that 676 is not a superpalindrome: 26 * 26 = 676, but 26 is not a palindrome.
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</pre>
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<p><strong>Example 2:</strong></p>
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<pre>
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<strong>Input:</strong> left = "1", right = "2"
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<strong>Output:</strong> 1
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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 <= left.length, right.length <= 18</code></li>
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<li><code>left</code> and <code>right</code> consist of only digits.</li>
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<li><code>left</code> and <code>right</code> cannot have leading zeros.</li>
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<li><code>left</code> and <code>right</code> represent integers in the range <code>[1, 10<sup>18</sup> - 1]</code>.</li>
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<li><code>left</code> is less than or equal to <code>right</code>.</li>
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</ul>
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