2018-10-10 18:03:03 -04:00
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---
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id: 5900f46e1000cf542c50ff81
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2020-12-16 00:37:30 -07:00
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title: 问题258：滞后的斐波那契序列
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2018-10-10 18:03:03 -04:00
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challengeType: 5
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videoUrl: ''
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---
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2020-12-16 00:37:30 -07:00
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# --description--
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2018-10-10 18:03:03 -04:00
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2020-12-16 00:37:30 -07:00
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序列定义为：
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2018-10-10 18:03:03 -04:00
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2020-12-16 00:37:30 -07:00
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gk = 1，对于0≤k≤1999gk = gk-2000 + gk-1999，对于k≥2000。对于k = 1018，找到gk mod 20092010。
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2018-10-10 18:03:03 -04:00
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2020-12-16 00:37:30 -07:00
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# --hints--
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2018-10-10 18:03:03 -04:00
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2020-12-16 00:37:30 -07:00
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`euler258()`应该返回12747994。
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2018-10-10 18:03:03 -04:00
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```js
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2020-12-16 00:37:30 -07:00
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assert.strictEqual(euler258(), 12747994);
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2018-10-10 18:03:03 -04:00
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```
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2020-12-16 00:37:30 -07:00
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# --solutions--
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2020-08-13 17:24:35 +02:00
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