60 lines
1.6 KiB
Markdown
60 lines
1.6 KiB
Markdown
---
|
||
id: 5900f3721000cf542c50fe85
|
||
challengeType: 5
|
||
title: 'Problem 6: Sum square difference'
|
||
videoUrl: ''
|
||
localeTitle: 问题6:求和方差
|
||
---
|
||
|
||
## Description
|
||
<section id="description">前十个自然数的平方和是, <div style="text-align: center;"> 1 <sup>2</sup> + 2 <sup>2</sup> + ... + 10 <sup>2</sup> = 385 </div>前十个自然数之和的平方是, <div style="text-align: center;"> (1 + 2 + ... + 10) <sup>2</sup> = 55 <sup>2</sup> = 3025 </div>因此,前十个自然数的平方和与和的平方之间的差值为3025 - 385 = 2640.求出前<code>n</code>自然数的平方和与总和的平方之间的差值。 </section>
|
||
|
||
## Instructions
|
||
<section id="instructions">
|
||
</section>
|
||
|
||
## Tests
|
||
<section id='tests'>
|
||
|
||
```yml
|
||
tests:
|
||
- text: <code>sumSquareDifference(10)</code>应该返回2640。
|
||
testString: 'assert.strictEqual(sumSquareDifference(10), 2640, "<code>sumSquareDifference(10)</code> should return 2640.");'
|
||
- text: <code>sumSquareDifference(20)</code>应该返回41230。
|
||
testString: 'assert.strictEqual(sumSquareDifference(20), 41230, "<code>sumSquareDifference(20)</code> should return 41230.");'
|
||
- text: <code>sumSquareDifference(100)</code>应该返回25164150。
|
||
testString: 'assert.strictEqual(sumSquareDifference(100), 25164150, "<code>sumSquareDifference(100)</code> should return 25164150.");'
|
||
|
||
```
|
||
|
||
</section>
|
||
|
||
## Challenge Seed
|
||
<section id='challengeSeed'>
|
||
|
||
<div id='js-seed'>
|
||
|
||
```js
|
||
function sumSquareDifference(n) {
|
||
// Good luck!
|
||
return true;
|
||
}
|
||
|
||
sumSquareDifference(100);
|
||
|
||
```
|
||
|
||
</div>
|
||
|
||
|
||
|
||
</section>
|
||
|
||
## Solution
|
||
<section id='solution'>
|
||
|
||
```js
|
||
// solution required
|
||
```
|
||
</section>
|