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leetcode-problemset/leetcode-cn/problem (English)/统计美丽整数的数目(English) [count-beautiful-numbers].html
2025-04-03 23:09:51 +08:00

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<p data-end="387" data-start="189">You are given two positive integers, <code><font face="monospace">l</font></code> and <code><font face="monospace">r</font></code>. A positive integer is called <strong data-end="276" data-start="263">beautiful</strong> if the product of its digits is divisible by the sum of its digits.</p>
<p data-end="529" data-start="448">Return the count of <strong>beautiful</strong> numbers between <code>l</code> and <code>r</code>, inclusive.</p>
<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>
<div class="example-block">
<p><strong>Input:</strong> <span class="example-io">l = 10, r = 20</span></p>
<p><strong>Output:</strong> <span class="example-io">2</span></p>
<p><strong>Explanation:</strong></p>
<p>The beautiful numbers in the range are 10 and 20.</p>
</div>
<p><strong class="example">Example 2:</strong></p>
<div class="example-block">
<p><strong>Input:</strong> <span class="example-io">l = 1, r = 15</span></p>
<p><strong>Output:</strong> <span class="example-io">10</span></p>
<p><strong>Explanation:</strong></p>
<p>The beautiful numbers in the range are 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10.</p>
</div>
<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>
<ul>
<li><code>1 &lt;= l &lt;= r &lt; 10<sup>9</sup></code></li>
</ul>