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freeCodeCamp/curriculum/challenges/chinese/10-coding-interview-prep/project-euler/problem-442-eleven-free-integers.md
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---
id: 5900f5271000cf542c510039
challengeType: 5
videoUrl: ''
title: 问题442十一个整数
---
## Description
<section id="description">
如果整数的十进制扩展不包含任何表示11的幂的子串除1之外则称其为十一无码。
例如2404和13431不包含11而911和4121331不是。
令En为第n个正十一无整数。 例如E3= 3E200= 213和E500000= 531563。
找出E1018
</section>
## Instructions
<section id="instructions">
</section>
## Tests
<section id='tests'>
```yml
tests:
- text: <code>euler442()</code>应该返回1295552661530920200。
testString: assert.strictEqual(euler442(), 1295552661530920200);
```
</section>
## Challenge Seed
<section id='challengeSeed'>
<div id='js-seed'>
```js
function euler442() {
// Good luck!
return true;
}
euler442();
```
</div>
</section>
## Solution
<section id='solution'>
```js
// solution required
```
/section>