57 lines
769 B
Markdown
57 lines
769 B
Markdown
---
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id: 5900f48f1000cf542c50ffa1
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challengeType: 5
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title: 'Problem 290: Digital Signature'
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---
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## Description
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<section id='description'>
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How many integers 0 ≤ n < 1018 have the property that the sum of the digits of n equals the sum of digits of 137n?
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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> should return 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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