2018-10-10 22:03:03 +00:00
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---
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id: 5900f4f41000cf542c510007
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challengeType: 5
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videoUrl: ''
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2020-10-01 15:54:21 +00:00
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title: 问题392:陷入困境的单位圆
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2018-10-10 22:03:03 +00:00
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---
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## Description
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<section id="description">直线网格是正交网格,其中网格线之间的间距不必是等距的。这种网格的一个例子是对数图纸。 <p>考虑笛卡尔坐标系中的直线网格,具有以下属性:网格线平行于笛卡尔坐标系的轴。有N + 2个垂直网格线和N + 2个水平网格线。因此存在(N + 1)x(N + 1)个矩形单元。两个外部垂直网格线的方程是x = -1且x = 1.两个外部水平网格线的方程是y = -1和y如果它们与单位圆重叠,则网格单元为红色,否则为黑色。对于这个问题,我们希望您找到剩余的N个内部水平线和N个内部垂直网格线的位置,以便红色占据的区域细胞最小化。 </p><p>例如,这里是N = 10的解决方案的图片: </p><p>红色单元占N = 10的区域舍入到小数点后面的10位是3.3469640797。 </p><p>找到N = 400的位置。将红色单元占用的区域四舍五入到小数点后面的10位数作为答案。 </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>euler392()</code>应返回3.1486734435。
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2020-02-17 16:40:55 +00:00
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testString: assert.strictEqual(euler392(), 3.1486734435);
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2018-10-10 22:03:03 +00:00
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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 euler392() {
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// Good luck!
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return true;
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}
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euler392();
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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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2020-08-13 15:24:35 +00:00
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/section>
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