79d9012432
* fix(curriculum): tests quotes * fix(curriculum): fill seed-teardown * fix(curriculum): fix tests and remove unneeded seed-teardown
58 lines
1.1 KiB
Markdown
58 lines
1.1 KiB
Markdown
---
|
|
id: 5900f3bb1000cf542c50fece
|
|
challengeType: 5
|
|
title: 'Problem 79: Passcode derivation'
|
|
---
|
|
|
|
## Description
|
|
<section id='description'>
|
|
A common security method used for online banking is to ask the user for three random characters from a passcode. For example, if the passcode was 531278, they may ask for the 2nd, 3rd, and 5th characters; the expected reply would be: 317.
|
|
The text file, keylog.txt, contains fifty successful login attempts.
|
|
Given that the three characters are always asked for in order, analyse the file so as to determine the shortest possible secret passcode of unknown length.
|
|
</section>
|
|
|
|
## Instructions
|
|
<section id='instructions'>
|
|
|
|
</section>
|
|
|
|
## Tests
|
|
<section id='tests'>
|
|
|
|
```yml
|
|
tests:
|
|
- text: <code>euler79()</code> should return 73162890.
|
|
testString: assert.strictEqual(euler79(), 73162890, '<code>euler79()</code> should return 73162890.');
|
|
|
|
```
|
|
|
|
</section>
|
|
|
|
## Challenge Seed
|
|
<section id='challengeSeed'>
|
|
|
|
<div id='js-seed'>
|
|
|
|
```js
|
|
function euler79() {
|
|
// Good luck!
|
|
return true;
|
|
}
|
|
|
|
euler79();
|
|
```
|
|
|
|
</div>
|
|
|
|
|
|
|
|
</section>
|
|
|
|
## Solution
|
|
<section id='solution'>
|
|
|
|
```js
|
|
// solution required
|
|
```
|
|
</section>
|