56 lines
1.2 KiB
Markdown
56 lines
1.2 KiB
Markdown
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---
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id: 5900f4fa1000cf542c51000d
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challengeType: 5
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title: 'Problem 398: Cutting rope'
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videoUrl: ''
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localeTitle: 问题398：切割绳索
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---
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## Description
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<section id="description">在长度为n的绳索内，放置n-1个点，彼此之间的距离为1，并且从端点开始。在这些点中，我们随机选择m-1个点并在这些点处切断绳索以创建m个段。 <p>设E（n，m）为第二最短段的预期长度。例如，E（3,2）= 2且E（8,3）= 16/7。注意，如果多个段具有相同的最短长度，则将第二最短段的长度定义为与最短长度相同。 </p><p>找到E（107,100）。将您的答案四舍五入到小数点后面的小数点后5位。 </p></section>
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## Instructions
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<section id="instructions">
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: <code>euler398()</code>应返回2010.59096。
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testString: 'assert.strictEqual(euler398(), 2010.59096, "<code>euler398()</code> should return 2010.59096.");'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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function euler398() {
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// Good luck!
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return true;
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}
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euler398();
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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// solution required
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```
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</section>
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