56 lines
1.2 KiB
Markdown
56 lines
1.2 KiB
Markdown
|
---
|
|||
|
id: 5900f53a1000cf542c51004c
|
|||
|
challengeType: 5
|
|||
|
title: 'Problem 461: Almost Pi'
|
|||
|
videoUrl: ''
|
|||
|
localeTitle: 问题461:几乎是Pi
|
|||
|
---
|
|||
|
|
|||
|
## Description
|
|||
|
<section id="description">对于所有非负整数k,设fn(k)= ek / n-1。值得注意的是,f200(6)+ f200(75)+ f200(89)+ f200(226)= 3.141592644529 ...≈π。事实上,对于n = 200,它是fn(a)+ fn(b)+ fn(c)+ fn(d)形式的π的最佳近似值。设g(n)= a2 + b2 + c2 + d 2为a,b,c,d最小化错误:| fn(a)+ fn(b)+ fn(c)+ fn(d) - π| (其中| x |表示x的绝对值)。给出g(200)= 62 + 752 + 892 + 2262 = 64658.求g(10000)。 </section>
|
|||
|
|
|||
|
## Instructions
|
|||
|
<section id="instructions">
|
|||
|
</section>
|
|||
|
|
|||
|
## Tests
|
|||
|
<section id='tests'>
|
|||
|
|
|||
|
```yml
|
|||
|
tests:
|
|||
|
- text: <code>euler461()</code>应该返回159820276。
|
|||
|
testString: 'assert.strictEqual(euler461(), 159820276, "<code>euler461()</code> should return 159820276.");'
|
|||
|
|
|||
|
```
|
|||
|
|
|||
|
</section>
|
|||
|
|
|||
|
## Challenge Seed
|
|||
|
<section id='challengeSeed'>
|
|||
|
|
|||
|
<div id='js-seed'>
|
|||
|
|
|||
|
```js
|
|||
|
function euler461() {
|
|||
|
// Good luck!
|
|||
|
return true;
|
|||
|
}
|
|||
|
|
|||
|
euler461();
|
|||
|
|
|||
|
```
|
|||
|
|
|||
|
</div>
|
|||
|
|
|||
|
|
|||
|
|
|||
|
</section>
|
|||
|
|
|||
|
## Solution
|
|||
|
<section id='solution'>
|
|||
|
|
|||
|
```js
|
|||
|
// solution required
|
|||
|
```
|
|||
|
</section>
|