56 lines
1.4 KiB
Markdown
56 lines
1.4 KiB
Markdown
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---
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id: 5900f4481000cf542c50ff5a
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challengeType: 5
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title: 'Problem 219: Skew-cost coding'
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videoUrl: ''
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localeTitle: 问题219：偏差成本编码
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---
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## Description
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<section id="description">设A和B为位串（0和1的序列）。如果A等于B的最左边长度（A）位，则A被称为B的前缀。例如，00110是001101001的前缀，但不是00111或100110的前缀。 <p>大小为n的无前缀代码是n个不同位串的集合，因此没有字符串是任何其他字符串的前缀。例如，这是一个大小为6的无前缀代码： </p><p> 0000,0001,001,01,10,11 </p><p>现在假设发送'0'位需要一分钱，而传输'1'需要4便士。然后，上面显示的无前缀代码的总成本是35便士，这恰好是所讨论的偏斜定价方案可能最便宜的。简而言之，我们写Cost（6）= 35。 </p><p>什么是成本（109）？ </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>euler219()</code>应返回64564225042。
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testString: 'assert.strictEqual(euler219(), 64564225042, "<code>euler219()</code> should return 64564225042.");'
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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 euler219() {
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// Good luck!
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return true;
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}
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euler219();
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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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