56 lines
1.1 KiB
Markdown
56 lines
1.1 KiB
Markdown
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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: 'Задача 120: Квадратные остатки'
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---
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## Description
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<section id="description"> Пусть r - остаток, когда (a-1) n + (a + 1) n делится на a2. Например, если a = 7 и n = 3, то r = 42: 63 + 83 = 728 ≡ 42 mod 49. А при изменении n также будет r, но при a = 7 получается, что rmax = 42. Для 3 ≤ a ≤ 1000 найдите Σ rmax. </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> должен вернуть 333082500.
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testString: 'assert.strictEqual(euler120(), 333082500, "<code>euler120()</code> should return 333082500.");'
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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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</section>
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