fix: replace .chinese.md extension with .md
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---
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id: 5900f4b71000cf542c50ffc9
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challengeType: 5
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title: 'Problem 330: Euler"s Number'
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videoUrl: ''
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localeTitle: 问题330:欧拉数
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---
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## Description
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<section id="description">为所有整数n定义了无限的实数序列a(n),如下所示: <p>例如,a(0)= 11! + 12! + 13! + ... = e - 1 a(1)= e - 11! + 12! + 13! + ... = 2e - 3 a(2)= 2e - 31! + e - 12! + 13! + ... = 72 e - 6 </p><p> e = 2.7182818 ......是欧拉常数。 </p><p>可以证明a(n)是形式</p><pre> <code>A(n) e + B(n)n! for integers A(n) and B(n).</code> </pre><p>例如a(10)= </p><pre> <code>328161643 e − 65269448610! .</code> </pre><p>求A(109)+ B(109)并给出答案mod 77 777 777。 </p></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>euler330()</code>应该返回15955822。
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testString: assert.strictEqual(euler330(), 15955822);
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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 euler330() {
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// Good luck!
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return true;
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}
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euler330();
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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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