59 lines
1.2 KiB
Markdown
59 lines
1.2 KiB
Markdown
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---
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id: 5900f3d51000cf542c50fee6
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challengeType: 5
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title: 'Problem 104: Pandigital Fibonacci ends'
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---
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## Description
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<section id='description'>
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The Fibonacci sequence is defined by the recurrence relation:
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Fn = Fn−1 + Fn−2, where F1 = 1 and F2 = 1.
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It turns out that F541, which contains 113 digits, is the first Fibonacci number for which the last nine digits are 1-9 pandigital (contain all the digits 1 to 9, but not necessarily in order). And F2749, which contains 575 digits, is the first Fibonacci number for which the first nine digits are 1-9 pandigital.
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Given that Fk is the first Fibonacci number for which the first nine digits AND the last nine digits are 1-9 pandigital, find k.
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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>euler104()</code> should return 329468.
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testString: 'assert.strictEqual(euler104(), 329468, ''<code>euler104()</code> should return 329468.'');'
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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 euler104() {
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// Good luck!
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return true;
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}
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euler104();
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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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