Project Notes

Perfect Squares

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Description

tab: English
 
<p>Given an integer <code>n</code>, return <em>the least number of perfect square numbers that sum to</em> <code>n</code>.</p>
 
<p>A <strong>perfect square</strong> is an integer that is the square of an integer; in other words, it is the product of some integer with itself. For example, <code>1</code>, <code>4</code>, <code>9</code>, and <code>16</code> are perfect squares while <code>3</code> and <code>11</code> are not.</p>
 
<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>
 
<pre>
<strong>Input:</strong> n = 12
<strong>Output:</strong> 3
<strong>Explanation:</strong> 12 = 4 + 4 + 4.
</pre>
 
<p><strong class="example">Example 2:</strong></p>
 
<pre>
<strong>Input:</strong> n = 13
<strong>Output:</strong> 2
<strong>Explanation:</strong> 13 = 4 + 9.
</pre>
 
<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>
 
<ul>
	<li><code>1 &lt;= n &lt;= 10<sup>4</sup></code></li>
</ul>
 
 
 
---
 
[submissions](https://leetcode.com/problems/perfect-squares/submissions/) | [solutions](https://leetcode.com/problems/perfect-squares/solutions/)
 
 
tab: 中文
 
<p>给你一个整数 <code>n</code> ，返回 <em>和为 <code>n</code> 的完全平方数的最少数量</em> 。</p>
 
<p><strong>完全平方数</strong> 是一个整数，其值等于另一个整数的平方；换句话说，其值等于一个整数自乘的积。例如，<code>1</code>、<code>4</code>、<code>9</code> 和 <code>16</code> 都是完全平方数，而 <code>3</code> 和 <code>11</code> 不是。</p>
 
<p>&nbsp;</p>
 
<p><strong>示例&nbsp;1：</strong></p>
 
<pre>
<strong>输入：</strong>n = <code>12</code>
<strong>输出：</strong>3 
<strong>解释：</strong><code>12 = 4 + 4 + 4</code></pre>
 
<p><strong>示例 2：</strong></p>
 
<pre>
<strong>输入：</strong>n = <code>13</code>
<strong>输出：</strong>2
<strong>解释：</strong><code>13 = 4 + 9</code></pre>
&nbsp;
 
<p><strong>提示：</strong></p>
 
<ul>
	<li><code>1 &lt;= n &lt;= 10<sup>4</sup></code></li>
</ul>
 
 
 
---
 
[提交记录](https://leetcode.cn/problems/perfect-squares/submissions/) | [题解](https://leetcode.cn/problems/perfect-squares/solution/)

Solutions & Notes

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