63 lines
1.2 KiB
Markdown
63 lines
1.2 KiB
Markdown
|
---
|
|||
|
|
id: 5900f4841000cf542c50ff97
|
|||
|
|
challengeType: 5
|
|||
|
|
videoUrl: ''
|
|||
|
localeTitle: 问题280：蚂蚁和种子
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
## Description
|
|||
|
|
<section id="description">
|
|||
|
|
费力的蚂蚁在5x5的网格上随机行走。 步行从中央广场开始。 在每个步骤中，蚂蚁都会随机移动到相邻的正方形，而不会离开网格。 因此，根据蚂蚁的位置，每一步有2、3或4种可能的移动。
|
|||
|
|
|
|||
|
|
步行开始时，将种子放在下排的每个正方形上。 当蚂蚁不携带种子并到达包含种子的下排的正方形时，它将开始携带种子。 蚂蚁会将种子放在最终到达的上一行的第一个空方格上。
|
|||
|
|
|
|||
|
|
在将所有种子都放到第一行之前，预期的步骤数是多少？
|
|||
|
|
将答案四舍五入到小数点后六位。
|
|||
|
|
</section>
|
|||
|
|
|
|||
|
|
## Instructions
|
|||
|
|
<section id="instructions">
|
|||
|
|
</section>
|
|||
|
|
|
|||
|
|
## Tests
|
|||
|
|
<section id='tests'>
|
|||
|
|
|
|||
|
|
```yml
|
|||
|
|
tests:
|
|||
|
|
- text: '<code>euler280()</code>应该返回430.088247。'
|
|||
|
|
testString: assert.strictEqual(euler280(), 430.088247);
|
|||
|
|
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
</section>
|
|||
|
|
|
|||
|
|
## Challenge Seed
|
|||
|
|
<section id='challengeSeed'>
|
|||
|
|
|
|||
|
|
<div id='js-seed'>
|
|||
|
|
|
|||
|
|
```js
|
|||
|
|
function euler280() {
|
|||
|
|
// Good luck!
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
euler280();
|
|||
|
|
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
</div>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
</section>
|
|||
|
|
|
|||
|
|
## Solution
|
|||
|
|
<section id='solution'>
|
|||
|
|
|
|||
|
|
```js
|
|||
|
|
// solution required
|
|||
|
|
```
|
|||
|
|
|||
|
|
/section>
|