60 lines
1.8 KiB
Markdown
60 lines
1.8 KiB
Markdown
---
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id: 5900f3941000cf542c50fea7
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challengeType: 5
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title: 'Problem 40: Champernowne"s constant'
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videoUrl: ''
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localeTitle: 'Problema 40: constante de Champernowne'
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---
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## Description
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<section id="description"> Una fracción decimal irracional se crea mediante la concatenación de los números enteros positivos: <span style="display: block; text-align: center;"><b style="color: red;">1</b> 0.12345678910 112131415161718192021 ...</span> Se puede observar que el 12 <sup>de</sup> dígitos de la parte fraccionaria es 1. Si <i>d <sub>n</sub></i> representa el <i><sup>enésimo</sup></i> dígitos de la parte fraccionaria, encontrar el valor de la siguiente expresion <span style="display: block; text-align: center;">d <sub>1</sub> × d <sub>10</sub> × d <sub>100</sub> × d <sub>1000</sub> × d <sub>10000</sub> × d <sub>100000</sub> × d <sub>1000000</sub></span> </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>champernownesConstant(100)</code> debe devolver 5.
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testString: 'assert.strictEqual(champernownesConstant(100), 5, "<code>champernownesConstant(100)</code> should return 5.");'
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- text: <code>champernownesConstant(1000)</code> debe devolver 15.
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testString: 'assert.strictEqual(champernownesConstant(1000), 15, "<code>champernownesConstant(1000)</code> should return 15.");'
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- text: <code>champernownesConstant(1000000)</code> debe devolver 210.
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testString: 'assert.strictEqual(champernownesConstant(1000000), 210, "<code>champernownesConstant(1000000)</code> should return 210.");'
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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 champernownesConstant(n) {
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// Good luck!
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return true;
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}
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champernownesConstant(100);
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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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