60 lines
746 B
Markdown
60 lines
746 B
Markdown
---
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id: 5900f48f1000cf542c50ffa1
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challengeType: 5
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videoUrl: ''
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title: 问题290：数字签名
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---
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## Description
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<section id="description">
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多少个0≤n <1018的整数具有n的位数之和等于137n的位数之和的性质？
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</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>euler290()</code>应该返回20444710234716470。
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testString: assert.strictEqual(euler290(), 20444710234716470);
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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 euler290() {
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// Good luck!
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return true;
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}
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euler290();
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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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