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leetcode-problemset/leetcode-cn/problem (Chinese)/配对交换 [exchange-lcci].html
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<p>配对交换。编写程序交换某个整数的奇数位和偶数位尽量使用较少的指令也就是说位0与位1交换位2与位3交换以此类推</p>
<p> <strong>示例1:</strong></p>
<pre>
<strong> 输入</strong>num = 2或者0b10
<strong> 输出</strong> 1 (或者 0b01)
</pre>
<p> <strong>示例2:</strong></p>
<pre>
<strong> 输入</strong>num = 3
<strong> 输出</strong>3
</pre>
<p> <strong>提示:</strong></p>
<ol>
<li><code>num</code>的范围在[0, 2^30 - 1]之间,不会发生整数溢出。</li>
</ol>