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Feat: add new Markdown parser (#39800)

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and change all the challenges to new `md` format.
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Oliver Eyton-Williams
2020-11-27 19:02:05 +01:00
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curriculum/challenges/english/10-coding-interview-prep/project-euler/problem-346-strong-repunits.md
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@ -1,41 +1,29 @@
---
id: 5900f4c71000cf542c50ffd8
challengeType: 5
title: 'Problem 346: Strong Repunits'
challengeType: 5
forumTopicId: 302005
---
## Description
<section id='description'>
# --description--
The number 7 is special, because 7 is 111 written in base 2, and 11 written in base 6 (i.e. 710 = 116 = 1112). In other words, 7 is a repunit in at least two bases b > 1.
We shall call a positive integer with this property a strong repunit. It can be verified that there are 8 strong repunits below 50: {1,7,13,15,21,31,40,43}. Furthermore, the sum of all strong repunits below 1000 equals 15864.
We shall call a positive integer with this property a strong repunit. It can be verified that there are 8 strong repunits below 50: {1,7,13,15,21,31,40,43}. Furthermore, the sum of all strong repunits below 1000 equals 15864.
Find the sum of all strong repunits below 1012.
</section>
## Instructions
<section id='instructions'>
# --hints--
</section>
## Tests
<section id='tests'>
```yml
tests:
- text: <code>euler346()</code> should return 336108797689259260.
testString: assert.strictEqual(euler346(), 336108797689259260);
`euler346()` should return 336108797689259260.
```js
assert.strictEqual(euler346(), 336108797689259260);
```
</section>
# --seed--
## Challenge Seed
<section id='challengeSeed'>
<div id='js-seed'>
## --seed-contents--
```js
function euler346() {
@ -46,17 +34,8 @@ function euler346() {
euler346();
```
</div>
</section>
## Solution
<section id='solution'>
# --solutions--
```js
// solution required
```
</section>