2018-10-10 22:03:03 +00:00
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id: 5900f52c1000cf542c51003d
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2020-12-16 07:37:30 +00:00
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title: 问题446:撤回B.
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2018-10-10 22:03:03 +00:00
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challengeType: 5
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videoUrl: ''
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2021-01-13 02:31:00 +00:00
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dashedName: problem-446-retractions-b
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2018-10-10 22:03:03 +00:00
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---
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2020-12-16 07:37:30 +00:00
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# --description--
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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对于每个整数n> 1,函数族fn,a,b由fn,a,b(x)≡ax+ b mod n定义为a,b,x整数和0
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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对于1≤n≤N,F(N)=ΣR(n4 + 4)。 F(1024)= 77532377300600。
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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求F(107)(mod 1 000 000 007)
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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# --hints--
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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`euler446()`应该返回907803852。
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2018-10-10 22:03:03 +00:00
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```js
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2020-12-16 07:37:30 +00:00
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assert.strictEqual(euler446(), 907803852);
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2018-10-10 22:03:03 +00:00
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```
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2021-01-13 02:31:00 +00:00
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# --seed--
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## --seed-contents--
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```js
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function euler446() {
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return true;
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}
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euler446();
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```
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2020-12-16 07:37:30 +00:00
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# --solutions--
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2020-08-13 15:24:35 +00:00
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2021-01-13 02:31:00 +00:00
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```js
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// solution required
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```
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