mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
synced 2025-01-10 18:48:13 +08:00
29 lines
719 B
HTML
29 lines
719 B
HTML
<p>输入一个整数 <code>n</code> ,求1~n这n个整数的十进制表示中1出现的次数。</p>
|
||
|
||
<p>例如,输入12,1~12这些整数中包含1 的数字有1、10、11和12,1一共出现了5次。</p>
|
||
|
||
<p> </p>
|
||
|
||
<p><strong>示例 1:</strong></p>
|
||
|
||
<pre>
|
||
<strong>输入:</strong>n = 12
|
||
<strong>输出:</strong>5
|
||
</pre>
|
||
|
||
<p><strong>示例 2:</strong></p>
|
||
|
||
<pre>
|
||
<strong>输入:</strong>n = 13
|
||
<strong>输出:</strong>6</pre>
|
||
|
||
<p> </p>
|
||
|
||
<p><strong>限制:</strong></p>
|
||
|
||
<ul>
|
||
<li><code>1 <= n < 2^31</code></li>
|
||
</ul>
|
||
|
||
<p>注意:本题与主站 233 题相同:<a href="https://leetcode-cn.com/problems/number-of-digit-one/">https://leetcode-cn.com/problems/number-of-digit-one/</a></p>
|