56 lines
1.3 KiB
Markdown
56 lines
1.3 KiB
Markdown
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---
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id: 5900f5081000cf542c510019
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challengeType: 5
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title: 'Problem 411: Uphill paths'
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videoUrl: ''
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localeTitle: 问题411：上坡路径
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---
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## Description
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<section id="description">设n是正整数。假设坐标（x，y）=（2i mod n，3i mod n）的站点为0≤i≤2n。我们将考虑与同一站点具有相同坐标的站点。 <p>我们希望形成从（0,0）到（n，n）的路径，使得x和y坐标永不减少。设S（n）是路径可以通过的最大站数。 </p><p>例如，如果n = 22，则有11个不同的站，并且有效路径最多可以通过5个站。因此，S（22）= 5.下面举例说明了一个最佳路径的例子： </p><p>还可以证实S（123）= 14并且S（10000）= 48。 </p><p>求1Σk≤30，ΣS（k5）。 </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>euler411()</code>应返回9936352。
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testString: 'assert.strictEqual(euler411(), 9936352, "<code>euler411()</code> should return 9936352.");'
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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 euler411() {
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// Good luck!
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return true;
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}
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euler411();
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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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