chore(learn): Applied MDX format to Chinese curriculum files (#40462)
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---
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id: 5951e88f64ebf159166a1176
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title: 24场比赛
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challengeType: 5
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videoUrl: ''
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title: 24场比赛
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---
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## Description
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<section id="description"><p>实现一个以四位数字串为参数的函数,每个数字从1──►9(含),允许重复,并返回一个算术表达式,其值为24。如果不存在这样的解,则返回“没有解决方案。“ </p><p>规则: </p>只允许以下运算符/函数:乘法,除法,加法,减法除法应使用浮点或有理算术等来保留余数。不允许从提供的数字中形成多位数字。 (所以当给出1,2,2和1时,12 + 12的答案是错误的)。给定的数字顺序不必保留。 <p>示例输入: </p> <code>solve24("4878");</code> <code>solve24("1234");</code> <code>solve24("6789");</code> <code>solve24("1127");</code> <p>示例输出(字符串): </p> <code>(7-8/8)*4</code> <code>3*1*4*2</code> <code>(6*8)/(9-7)</code> <code>(1+7)*(2+1)</code> </section>
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# --description--
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## Instructions
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<section id="instructions">
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</section>
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<p>实现一个以四位数字串为参数的函数,每个数字从1──►9(含),允许重复,并返回一个算术表达式,其值为24。如果不存在这样的解,则返回“没有解决方案。“ </p><p>规则: </p>只允许以下运算符/函数:乘法,除法,加法,减法除法应使用浮点或有理算术等来保留余数。不允许从提供的数字中形成多位数字。 (所以当给出1,2,2和1时,12 + 12的答案是错误的)。给定的数字顺序不必保留。 <p>示例输入: </p> <code>solve24("4878");</code> <code>solve24("1234");</code> <code>solve24("6789");</code> <code>solve24("1127");</code> <p>示例输出(字符串): </p> <code>(7-8/8)\*4</code> <code>3\*1\*4\*2</code> <code>(6\*8)/(9-7)</code> <code>(1+7)\*(2+1)</code>
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## Tests
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<section id='tests'>
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# --hints--
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```yml
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tests:
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- text: <code>solve24</code>是一个函数。
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testString: assert(typeof solve24 === 'function');
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- text: <code>solve24("4878")</code>应返回<code>(7-8/8)*4</code>或<code>4*(7-8/8)</code>
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testString: assert(include(answers[0], solve24(testCases[0])));
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- text: <code>solve24("1234")</code>应返回<code>1*2*3*4</code>任何排列
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testString: assert(include(answers[1], solve24(testCases[1])));
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- text: <code>solve24("6789")</code>应返回<code>(6*8)/(9-7)</code>或<code>(8*6)/(9-7)</code>
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testString: assert(include(answers[2], solve24(testCases[2])));
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- text: <code>solve24("1127")</code>应该返回<code>(1+7)*(1*2)</code>的排列
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testString: assert(include(answers[3], solve24(testCases[3])));
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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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`solve24`是一个函数。
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```js
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function solve24 (numStr) {
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// Good luck!
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return true;
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}
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assert(typeof solve24 === 'function');
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```
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</div>
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### After Test
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<div id='js-teardown'>
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`solve24("4878")`应返回`(7-8/8)*4`或`4*(7-8/8)`
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```js
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console.info('after the test');
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assert(include(answers[0], solve24(testCases[0])));
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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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`solve24("1234")`应返回`1*2*3*4`任何排列
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```js
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// solution required
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assert(include(answers[1], solve24(testCases[1])));
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```
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/section>
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`solve24("6789")`应返回`(6*8)/(9-7)`或`(8*6)/(9-7)`
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```js
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assert(include(answers[2], solve24(testCases[2])));
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```
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`solve24("1127")`应该返回`(1+7)*(1*2)`的排列
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```js
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assert(include(answers[3], solve24(testCases[3])));
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```
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# --solutions--
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