https://github.com/yankouskia/love-triangle
Love triangle
https://github.com/yankouskia/love-triangle
Last synced: 20 days ago
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Love triangle
- Host: GitHub
- URL: https://github.com/yankouskia/love-triangle
- Owner: yankouskia
- License: mit
- Created: 2018-02-18T15:45:25.000Z (about 7 years ago)
- Default Branch: master
- Last Pushed: 2018-09-16T06:12:01.000Z (over 6 years ago)
- Last Synced: 2025-03-29T02:03:49.683Z (27 days ago)
- Language: JavaScript
- Size: 33.2 KB
- Stars: 3
- Watchers: 1
- Forks: 871
- Open Issues: 0
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Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Love triangles
## History
Spichonees (made-up name) live in country Spichland where are no gender. Spichonees are big lovers, so each Spichonee loves any another Spichonee. Unfortunately there are sometimes situations, when Spichonee A loves Spichonee B, Spichonee B loves Spichonee C and Spichonee C loves Spichonee A. This phenomenon is called *Love triangle*.
## Task
Your task is to implement function `getLoveTrianglesCount` which calculates how many *love triangles phenomenons* take place. The function takes the array of integers as the only parameter. An integer `k` on `n`th place means, that `n`th Spichonee loves `k`th Spichonee.
For example:
```js
// 1 2 3 Spichonees
let count = getLoveTrianglesCount([2, 3, 1]);
console.log(count); // 1
/**
1st Spichonee loves 2nd Spichonee.
2nd Spichonee loves 3rd Spichonee.
3rd Spichonee love 1st Spichonee.
There is love triangle.
*/
```
Write your code in `src/index.js.
*Be sure, that all tests are positive. That means you cannot catch any error in tests.*
## Prepare and test
- Install [Node.js](https://nodejs.org/en/)
- Clone this repository: `git clone https://github.com/yankouskia/love-triangle.git`
- Go to folder `love-triangle`
- Run `npm install` in command line
- Run `npm test` in command line
- You will see the number of passing and failing tests