79d9012432
* fix(curriculum): tests quotes * fix(curriculum): fill seed-teardown * fix(curriculum): fix tests and remove unneeded seed-teardown
66 lines
993 B
Markdown
66 lines
993 B
Markdown
---
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id: 5900f4ed1000cf542c50ffff
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challengeType: 5
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title: 'Problem 383: Divisibility comparison between factorials'
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---
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## Description
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<section id='description'>
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Let f5(n) be the largest integer x for which 5x divides n.
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For example, f5(625000) = 7.
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Let T5(n) be the number of integers i which satisfy f5((2·i-1)!) < 2·f5(i!) and 1 ≤ i ≤ n.
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It can be verified that T5(103) = 68 and T5(109) = 2408210.
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Find T5(1018).
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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>euler383()</code> should return 22173624649806.
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testString: assert.strictEqual(euler383(), 22173624649806, '<code>euler383()</code> should return 22173624649806.');
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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 euler383() {
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// Good luck!
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return true;
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}
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euler383();
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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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