<p>aqrtで可能</p>
<div class="code-block-container"><pre><code>double u;
//計算
cout&lt;&lt;setprecision(20)&lt;&lt;(double)sqrt(u)&lt;&lt;endl;
</code></pre></div><p><span class="embed-block zenn-embedded zenn-embedded-card"><iframe id="zenn-embedded__27085ddcc95ae" src="https://embed.zenn.studio/card#zenn-embedded__27085ddcc95ae" data-content="https%3A%2F%2Fatcoder.jp%2Fcontests%2Fabc180%2Ftasks%2Fabc180_b" frameborder="0" scrolling="no" loading="lazy"></iframe></span><a href="https://atcoder.jp/contests/abc180/tasks/abc180_b" style="display:none" target="_blank" rel="nofollow noopener noreferrer">https://atcoder.jp/contests/abc180/tasks/abc180_b</a></p>


C++ 平方根を求める

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