2018-10-10 18:03:03 -04:00
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---
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id: 5900f3e41000cf542c50fef7
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challengeType: 5
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title: 'Problem 120: Square remainders'
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videoUrl: ''
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localeTitle: 问题120：方形剩余部分
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---
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## Description
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<section id="description">设r是（a-1）n +（a + 1）n除以a2时的余数。例如，如果a = 7且n = 3，则r = 42：63 + 83 =728≡42mod 49.并且当n变化时，r也将变化，但是对于a = 7，结果是rmax = 42。对于3≤a≤1000，找到Σrmax。 </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>euler120()</code>应返回333082500。
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2020-02-18 01:40:55 +09:00
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testString: assert.strictEqual(euler120(), 333082500);
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2018-10-10 18:03:03 -04:00
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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 euler120() {
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// Good luck!
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return true;
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}
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euler120();
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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 17:24:35 +02:00
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/section>
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