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30 lines
894 B
HTML
30 lines
894 B
HTML
<p>某班级学号记录系统发生错乱，原整数学号序列 <code>[1,2,3,4,...]</code> 分隔符丢失后变为 <code>1234...</code> 的字符序列。请实现一个函数返回该字符序列中的第 <code>k</code> 位数字。</p>
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<p> </p>
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<p><strong>示例 1：</strong></p>
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<pre>
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<strong>输入：</strong>k = 5
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<strong>输出：</strong>5
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</pre>
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<p><strong>示例 2：</strong></p>
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<pre>
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<strong>输入：</strong>k = 12
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<strong>输出：</strong>1
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<strong>解释：</strong>第 12 位数字在序列 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, ... 里是 1 ，它是 11 的一部分。</pre>
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<p> </p>
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<p><strong>提示：</strong></p>
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<ul>
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<li><code>0 <= k < 2<sup>31</sup></code></li>
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</ul>
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<p>注意：本题与主站 400 题相同：<a href="https://leetcode-cn.com/problems/nth-digit/">https://leetcode-cn.com/problems/nth-digit/</a></p>
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<p> </p>
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