2020-10-06 23:10:08 +05:30

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---
id: 5900f51d1000cf542c51002f
challengeType: 5
videoUrl: ''
title: 问题433欧几里得算法的步骤
---
## Description
<section id="description">
设Ex0y0为用Euclid算法确定x0和y0的最大公约数所需要的步数。 更正式地说x1 = y0y1 = x0 mod y0xn = yn-1yn = xn-1 mod yn-1
Ex0y0是最小的n因此yn = 0。
我们有E1,1= 1E10,6= 3和E6,10= 4。
将SN定义为1≤xy≤N的Exy之和。
我们有S1= 1S10= 221和S100= 39826。
求S5·106
</section>
## Instructions
<section id="instructions">
</section>
## Tests
<section id='tests'>
```yml
tests:
- text: <code>euler433()</code>应该返回326624372659664。
testString: assert.strictEqual(euler433(), 326624372659664);
```
</section>
## Challenge Seed
<section id='challengeSeed'>
<div id='js-seed'>
```js
function euler433() {
// Good luck!
return true;
}
euler433();
```
</div>
</section>
## Solution
<section id='solution'>
```js
// solution required
```
/section>