freeCodeCamp/curriculum/challenges/chinese/10-coding-interview-prep/project-euler/problem-171-finding-numbers-for-which-the-sum-of-the-squares-of-the-digits-is-a-square.md

---
id: 5900f4181000cf542c50ff2a
challengeType: 5
videoUrl: ''
title: 问题171：找到数字的平方和为正方形的数字
---

## Description
<section id="description">对于正整数n，令f（n）为n的数字（在基数10中）的平方和，例如f（3）= 32 = 9，f（25）= 22 + 52 = 4 + 25 = 29，f（442）= 42 + 42 + 22 = 16 + 16 + 4 = 36找到所有n的总和的最后九位数，0 &lt;n &lt;1020，使得f（n）是一个完美的平方。 </section>

## Instructions
<section id="instructions">
</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: <code>euler171()</code>应该返回142989277。
    testString: assert.strictEqual(euler171(), 142989277);

```

</section>

## Challenge Seed
<section id='challengeSeed'>

<div id='js-seed'>

```js
function euler171() {
  // Good luck!
  return true;
}

euler171();

```

</div>



</section>

## Solution
<section id='solution'>

```js
// solution required
```

/section>