56 lines
1.1 KiB
Markdown
56 lines
1.1 KiB
Markdown
|
---
|
|||
|
|
id: 5900f4ef1000cf542c510001
|
|||
|
|
challengeType: 5
|
|||
|
|
title: 'Problem 386: Maximum length of an antichain'
|
|||
|
|
videoUrl: ''
|
|||
|
|
localeTitle: 问题386：反链的最大长度
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
## Description
|
|||
|
|
<section id="description">令n为整数，S（n）为n的因子集。 <p>如果A仅包含一个元素，或者如果A的元素中没有一个除以A的任何其他元素，则S（n）的子集A被称为S（n）的反共。 </p><p>例如：S（30）= {1,2,3,5,6,10,15,30} {2,5,6}不是S（30）的反链。 {2,3,5}是S（30）的反链。 </p><p>设N（n）为S（n）的反链的最大长度。 </p><p>找ΣN（n）为1≤n≤108 </p></section>
|
|||
|
|
|
|||
|
|
## Instructions
|
|||
|
|
<section id="instructions">
|
|||
|
|
</section>
|
|||
|
|
|
|||
|
|
## Tests
|
|||
|
|
<section id='tests'>
|
|||
|
|
|
|||
|
|
```yml
|
|||
|
|
tests:
|
|||
|
|
- text: <code>euler386()</code>应该返回528755790。
|
|||
|
|
testString: 'assert.strictEqual(euler386(), 528755790, "<code>euler386()</code> should return 528755790.");'
|
|||
|
|
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
</section>
|
|||
|
|
|
|||
|
|
## Challenge Seed
|
|||
|
|
<section id='challengeSeed'>
|
|||
|
|
|
|||
|
|
<div id='js-seed'>
|
|||
|
|
|
|||
|
|
```js
|
|||
|
|
function euler386() {
|
|||
|
|
// Good luck!
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
euler386();
|
|||
|
|
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
</div>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
</section>
|
|||
|
|
|
|||
|
|
## Solution
|
|||
|
|
<section id='solution'>
|
|||
|
|
|
|||
|
|
```js
|
|||
|
|
// solution required
|
|||
|
|
```
|
|||
|
|
</section>
|