mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
synced 2025-11-04 11:43:12 +08:00
32 lines
1005 B
HTML
32 lines
1005 B
HTML
<p>Given a non-negative integer <code>x</code>, return <em>the square root of </em><code>x</code><em> rounded down to the nearest integer</em>. The returned integer should be <strong>non-negative</strong> as well.</p>
|
|
|
|
<p>You <strong>must not use</strong> any built-in exponent function or operator.</p>
|
|
|
|
<ul>
|
|
<li>For example, do not use <code>pow(x, 0.5)</code> in c++ or <code>x ** 0.5</code> in python.</li>
|
|
</ul>
|
|
|
|
<p> </p>
|
|
<p><strong class="example">Example 1:</strong></p>
|
|
|
|
<pre>
|
|
<strong>Input:</strong> x = 4
|
|
<strong>Output:</strong> 2
|
|
<strong>Explanation:</strong> The square root of 4 is 2, so we return 2.
|
|
</pre>
|
|
|
|
<p><strong class="example">Example 2:</strong></p>
|
|
|
|
<pre>
|
|
<strong>Input:</strong> x = 8
|
|
<strong>Output:</strong> 2
|
|
<strong>Explanation:</strong> The square root of 8 is 2.82842..., and since we round it down to the nearest integer, 2 is returned.
|
|
</pre>
|
|
|
|
<p> </p>
|
|
<p><strong>Constraints:</strong></p>
|
|
|
|
<ul>
|
|
<li><code>0 <= x <= 2<sup>31</sup> - 1</code></li>
|
|
</ul>
|