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    <description>Latest 20 threads of 交互式</description>
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      <title>$n!$ 末尾零的个数</title>
      <link>https://www.zhangzujin.cn/forum.php?mod=viewthread&amp;tid=5877</link>
      <description><![CDATA[Sum Calculation



请输入正整数 $n$, 您将得到 $n!$ 末尾有多少个零, 计算公式为 $\\displaystyle \\sum_{k=1}^\\infty \\frac{n}{5^k}$.
    
    计算
    
    
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      <category>交互式</category>
      <author>zhangzujin</author>
      <pubDate>Tue, 18 Mar 2025 05:04:45 +0000</pubDate>
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