2018-10-10 22:03:03 +00:00
|
|
|
|
---
|
|
|
|
|
id: 5900f4381000cf542c50ff4a
|
|
|
|
|
challengeType: 5
|
|
|
|
|
videoUrl: ''
|
2020-10-01 15:54:21 +00:00
|
|
|
|
title: 问题203:无平方二项系数
|
2018-10-10 22:03:03 +00:00
|
|
|
|
---
|
|
|
|
|
|
|
|
|
|
## Description
|
|
|
|
|
<section id="description">二项式系数nCk可以以三角形排列,Pascal的三角形,如下所示: <p> 111121133114641151010511615201561172135352171 ......... </p><p>可以看出Pascal三角形的前八行包含十二个不同的数字:1,2,3,4,5,6,7,10,15,20,21和35。 </p><p>如果没有素数的平方除n,则正整数n称为squarefree。在Pascal三角形的前八行中的十二个不同数字中,除了4和20之外的所有数字都是无方形的。前八行中不同的无平方数字的总和为105。 </p><p>找到Pascal三角形的前51行中不同的无平方数字的总和。 </p></section>
|
|
|
|
|
|
|
|
|
|
## Instructions
|
|
|
|
|
<section id="instructions">
|
|
|
|
|
</section>
|
|
|
|
|
|
|
|
|
|
## Tests
|
|
|
|
|
<section id='tests'>
|
|
|
|
|
|
|
|
|
|
```yml
|
|
|
|
|
tests:
|
|
|
|
|
- text: <code>euler203()</code>应该返回34029210557338。
|
2020-02-17 16:40:55 +00:00
|
|
|
|
testString: assert.strictEqual(euler203(), 34029210557338);
|
2018-10-10 22:03:03 +00:00
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
</section>
|
|
|
|
|
|
|
|
|
|
## Challenge Seed
|
|
|
|
|
<section id='challengeSeed'>
|
|
|
|
|
|
|
|
|
|
<div id='js-seed'>
|
|
|
|
|
|
|
|
|
|
```js
|
|
|
|
|
function euler203() {
|
|
|
|
|
// Good luck!
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
euler203();
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
</div>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
</section>
|
|
|
|
|
|
|
|
|
|
## Solution
|
|
|
|
|
<section id='solution'>
|
|
|
|
|
|
|
|
|
|
```js
|
|
|
|
|
// solution required
|
|
|
|
|
```
|
2020-08-13 15:24:35 +00:00
|
|
|
|
|
|
|
|
|
/section>
|