60 lines
1.7 KiB
Markdown
60 lines
1.7 KiB
Markdown
---
|
||
id: 5900f3941000cf542c50fea7
|
||
challengeType: 5
|
||
title: 'Problem 40: Champernowne"s constant'
|
||
videoUrl: ''
|
||
localeTitle: 问题40：Champernowne的常数
|
||
---
|
||
|
||
## Description
|
||
<section id="description">通过连接正整数创建无理小数： <span style="display: block; text-align: center;">0.12345678910 <b style="color: red;">1</b> 112131415161718192021 ...</span>可以看出小数部分的<sup>第</sup> 12位是1.如果<i>d <sub>n</sub></i>代表小数部分的<sup>第</sup> <i>n</i>位，找到值以下表达式。 <span style="display: block; text-align: center;">d <sub>1</sub> ×d <sub>10</sub> ×d <sub>100</sub> ×d <sub>1000</sub> ×d <sub>10000</sub> ×d <sub>100000</sub> ×d <sub>1000000</sub></span> </section>
|
||
|
||
## Instructions
|
||
<section id="instructions">
|
||
</section>
|
||
|
||
## Tests
|
||
<section id='tests'>
|
||
|
||
```yml
|
||
tests:
|
||
- text: <code>champernownesConstant(100)</code>应该返回5。
|
||
testString: 'assert.strictEqual(champernownesConstant(100), 5, "<code>champernownesConstant(100)</code> should return 5.");'
|
||
- text: <code>champernownesConstant(1000)</code>应该返回15。
|
||
testString: 'assert.strictEqual(champernownesConstant(1000), 15, "<code>champernownesConstant(1000)</code> should return 15.");'
|
||
- text: <code>champernownesConstant(1000000)</code>应该返回210。
|
||
testString: 'assert.strictEqual(champernownesConstant(1000000), 210, "<code>champernownesConstant(1000000)</code> should return 210.");'
|
||
|
||
```
|
||
|
||
</section>
|
||
|
||
## Challenge Seed
|
||
<section id='challengeSeed'>
|
||
|
||
<div id='js-seed'>
|
||
|
||
```js
|
||
function champernownesConstant(n) {
|
||
// Good luck!
|
||
return true;
|
||
}
|
||
|
||
champernownesConstant(100);
|
||
|
||
```
|
||
|
||
</div>
|
||
|
||
|
||
|
||
</section>
|
||
|
||
## Solution
|
||
<section id='solution'>
|
||
|
||
```js
|
||
// solution required
|
||
```
|
||
</section>
|