72 lines
1.4 KiB
Markdown
72 lines
1.4 KiB
Markdown
---
|
|
id: 5900f3bf1000cf542c50fed2
|
|
challengeType: 5
|
|
title: 'Problem 83: Path sum: four ways'
|
|
forumTopicId: 302197
|
|
---
|
|
|
|
## Description
|
|
<section id='description'>
|
|
NOTE: This problem is a significantly more challenging version of Problem 81.
|
|
In the 5 by 5 matrix below, the minimal path sum from the top left to the bottom right, by moving left, right, up, and down, is indicated in bold red and is equal to 2297.
|
|
|
|
$$
|
|
\begin{pmatrix}
|
|
\color{red}{131} & 673 & \color{red}{234} & \color{red}{103} & \color{red}{18}\\
|
|
\color{red}{201} & \color{red}{96} & \color{red}{342} & 965 & \color{red}{150}\\
|
|
630 & 803 & 746 & \color{red}{422} & \color{red}{111}\\
|
|
537 & 699 & 497 & \color{red}{121} & 956\\
|
|
805 & 732 & 524 & \color{red}{37} & \color{red}{331}
|
|
\end{pmatrix}
|
|
$$
|
|
|
|
Find the minimal path sum, in matrix.txt (right click and
|
|
"Save Link/Target As..."), a 31K text file containing a 80 by 80 matrix, from the top left to the bottom right by moving left, right, up, and down.
|
|
</section>
|
|
|
|
## Instructions
|
|
<section id='instructions'>
|
|
|
|
</section>
|
|
|
|
## Tests
|
|
<section id='tests'>
|
|
|
|
```yml
|
|
tests:
|
|
- text: <code>euler83()</code> should return 425185.
|
|
testString: assert.strictEqual(euler83(), 425185);
|
|
|
|
```
|
|
|
|
</section>
|
|
|
|
## Challenge Seed
|
|
<section id='challengeSeed'>
|
|
|
|
<div id='js-seed'>
|
|
|
|
```js
|
|
function euler83() {
|
|
// Good luck!
|
|
return true;
|
|
}
|
|
|
|
euler83();
|
|
```
|
|
|
|
</div>
|
|
|
|
|
|
|
|
</section>
|
|
|
|
## Solution
|
|
<section id='solution'>
|
|
|
|
```js
|
|
// solution required
|
|
```
|
|
|
|
</section>
|