擅长:python、mysql、java
<p>让我以10101作为输入示例来解释这一点。在</p>
<pre><code>1 should be multiplied by 2^4
0 should be multiplied by 2^3
1 should be multiplied by 2^2
0 should be multiplied by 2^1
1 should be multiplied by 2^0
and Add everything.
</code></pre>
<p>程序每次遇到一个数字就乘以2。所以基本上,第一个1乘以4,前0乘以3,直到最后一个1。在</p>
<p>像这样。在</p>
^{pr2}$