56 lines
1.0 KiB
Markdown
56 lines
1.0 KiB
Markdown
---
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id: 5900f4461000cf542c50ff58
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challengeType: 5
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videoUrl: ''
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title: 问题217：平衡数字
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---
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## Description
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<section id="description">具有k（十进制）数字的正整数称为平衡，如果其第一个⌈k/2⌉数字总和为与其最后的⌈k/2⌉数字相同的值，其中⌈x⌉，x的发音上限，是最小整数≥x，因此⌈π⌉= 4且⌈5⌉= 5.因此，例如，所有回文都是平衡的，如13722.设T（n）是所有平衡数小于10n的总和。因此：T（1）= 45，T（2）= 540，T（5）= 334795890.求T（47）mod 315 </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>euler217()</code>应该返回6273134。
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testString: assert.strictEqual(euler217(), 6273134);
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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 euler217() {
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// Good luck!
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return true;
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}
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euler217();
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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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