41 lines
579 B
Markdown
41 lines
579 B
Markdown
---
|
|
id: 5900f46e1000cf542c50ff81
|
|
title: 'Problem 258: A lagged Fibonacci sequence'
|
|
challengeType: 5
|
|
forumTopicId: 301906
|
|
dashedName: problem-258-a-lagged-fibonacci-sequence
|
|
---
|
|
|
|
# --description--
|
|
|
|
A sequence is defined as:
|
|
|
|
gk = 1, for 0 ≤ k ≤ 1999 gk = gk-2000 + gk-1999, for k ≥ 2000. Find gk mod 20092010 for k = 1018.
|
|
|
|
# --hints--
|
|
|
|
`euler258()` should return 12747994.
|
|
|
|
```js
|
|
assert.strictEqual(euler258(), 12747994);
|
|
```
|
|
|
|
# --seed--
|
|
|
|
## --seed-contents--
|
|
|
|
```js
|
|
function euler258() {
|
|
|
|
return true;
|
|
}
|
|
|
|
euler258();
|
|
```
|
|
|
|
# --solutions--
|
|
|
|
```js
|
|
// solution required
|
|
```
|