72 lines
1.3 KiB
Markdown
72 lines
1.3 KiB
Markdown
---
|
||
id: 5900f48d1000cf542c50ffa0
|
||
challengeType: 5
|
||
videoUrl: ''
|
||
title: 问题289:欧拉循环
|
||
---
|
||
|
||
## Description
|
||
<section id="description">
|
||
令C(x,y)为穿过点(x,y),(x,y + 1),(x + 1,y)和(x + 1,y + 1)的圆。
|
||
|
||
对于正整数m和n,令E(m,n)为由m·n个圆组成的配置:
|
||
{C(x,y):0≤x <m,0≤y <n,x和y是整数}
|
||
|
||
E(m,n)上的欧拉循环是一条闭合路径,它恰好通过每个圆弧一次。
|
||
E(m,n)上可能有许多这样的路径,但是我们只对那些不会自交叉的路径感兴趣:
|
||
非相交路径仅在格点处触碰自身,但从未相交。
|
||
|
||
下图显示了E(3,3)和一个欧拉非交叉路径的示例。
|
||
|
||
令L(m,n)为E(m,n)上的欧拉非交叉路径数。
|
||
例如,L(1,2)= 2,L(2,2)= 37,L(3,3)= 104290。
|
||
|
||
找出L(6,10)mod 1010。
|
||
</section>
|
||
|
||
## Instructions
|
||
<section id="instructions">
|
||
</section>
|
||
|
||
## Tests
|
||
<section id='tests'>
|
||
|
||
```yml
|
||
tests:
|
||
- text: <code>euler289()</code>应该返回6567944538。
|
||
testString: assert.strictEqual(euler289(), 6567944538);
|
||
|
||
```
|
||
|
||
</section>
|
||
|
||
## Challenge Seed
|
||
<section id='challengeSeed'>
|
||
|
||
<div id='js-seed'>
|
||
|
||
```js
|
||
function euler289() {
|
||
// Good luck!
|
||
return true;
|
||
}
|
||
|
||
euler289();
|
||
|
||
```
|
||
|
||
</div>
|
||
|
||
|
||
|
||
</section>
|
||
|
||
## Solution
|
||
<section id='solution'>
|
||
|
||
```js
|
||
// solution required
|
||
```
|
||
|
||
/section>
|