2018-10-10 18:03:03 -04:00
|
|
|
|
---
|
|
|
|
|
|
id: 5900f43e1000cf542c50ff50
|
|
|
|
|
|
challengeType: 5
|
|
|
|
|
|
title: 'Problem 210: Obtuse Angled Triangles'
|
|
|
|
|
|
videoUrl: ''
|
|
|
|
|
|
localeTitle: 问题210：钝角三角形
|
|
|
|
|
|
---
|
|
|
|
|
|
|
|
|
|
|
|
## Description
|
|
|
|
|
|
<section id="description">考虑点（x，y）的集合S（r），其中整数坐标满足| x | + | y | ≤r。设O为点（0,0），C为点（r / 4，r / 4）。令N（r）为S（r）中的点B的数量，使得三角形OBC具有钝角，即最大角度α满足90°<α<180°。因此，例如，N（4）= 24并且N（8）= 100。 <p>什么是N（1,000,000,000）？ </p></section>
|
|
|
|
|
|
|
|
|
|
|
|
## Instructions
|
|
|
|
|
|
<section id="instructions">
|
|
|
|
|
|
</section>
|
|
|
|
|
|
|
|
|
|
|
|
## Tests
|
|
|
|
|
|
<section id='tests'>
|
|
|
|
|
|
|
|
|
|
|
|
```yml
|
|
|
|
|
|
tests:
|
|
|
|
|
|
- text: <code>euler210()</code>应该返回1598174770174689500。
|
2020-02-18 01:40:55 +09:00
|
|
|
|
testString: assert.strictEqual(euler210(), 1598174770174689500);
|
2018-10-10 18:03:03 -04:00
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
</section>
|
|
|
|
|
|
|
|
|
|
|
|
## Challenge Seed
|
|
|
|
|
|
<section id='challengeSeed'>
|
|
|
|
|
|
|
|
|
|
|
|
<div id='js-seed'>
|
|
|
|
|
|
|
|
|
|
|
|
```js
|
|
|
|
|
|
function euler210() {
|
|
|
|
|
|
// Good luck!
|
|
|
|
|
|
return true;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
euler210();
|
|
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
</div>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
</section>
|
|
|
|
|
|
|
|
|
|
|
|
## Solution
|
|
|
|
|
|
<section id='solution'>
|
|
|
|
|
|
|
|
|
|
|
|
```js
|
|
|
|
|
|
// solution required
|
|
|
|
|
|
```
|
2020-08-13 17:24:35 +02:00
|
|
|
|
|
|
|
|
|
|
/section>
|
