Mandatory Sprint 3 Codewars Katas

### Link to the coursework

https://www.codewars.com/collections/cyf-data-flows-sprint-3-mandatory

### Learning Objectives

- [ ] Practice applying concepts related to the sprint's prep material in a kata.
- [ ] Problem solve a new coding challenge.

### Why are we doing this?
Every week, you need to complete all of the katas in the collection. If you have extra time, you can do extra katas at random on CodeWars.

Spend at least 20 minutes per kata, find time at least three times a week to complete this.

Find the Collection called "CYF Data Flows | Sprint 1 | Mandatory" on [the CodeYourFuture account](https://www.codewars.com/users/CodeYourFuture/authored_collections).

Check your Codewars completion status via the [Codewars Progress Checker](https://codeyourfuture.github.io/Codewars-Progress-Checker/).

### Maximum time in hours

2

### How to get help

Join the #cyf-codewars Slack channel
Read the [CYF Codewars docs](https://docs.codeyourfuture.io/leaders/running-the-course/codewars)
Read [Codewars advice from CYFers](https://docs.codeyourfuture.io/leaders/running-the-course/codewars/codewars-advice-from-cyfers)
Read [Codewars advice from mentors](https://docs.codeyourfuture.io/leaders/running-the-course/codewars/codewars-advice-from-mentors)
Book a pair programming slot from the available pairing appointments in the [CYF Pair Programming Slack Canvas ](https://codeyourfutur-yov6609.slack.com/docs/T07MCNDRDHV/F07PAGC9022)

### How to submit

Fork the repo to your own GitHub account
Make regular small commits with clear messages
When you are ready, open a Pull Request to the CYF repo
Make sure you fill in the PR template provided

### How to review

Share a link in the form https://codeyourfuture.github.io/Codewars-Progress-Checker/#YOUR_CODEWARS_USERNAME.

You can obtain the link from the browser location bar after submitting your Codewars username on the [Codewars Progress Checker](https://codeyourfuture.github.io/Codewars-Progress-Checker/) page.

リンクされた Codewars コレクションを開き、記載されている Sprint 3 のタスクと比較してください。なお、手順では Sprint 1 のコレクションも参照されています。必須の kata を完了し、Codewars Progress Checker を使用して完了を確認したうえで、進捗リンクを添えた要求された pull request をレビュー用に提出してください。

索引モデルが issue の本文から書いたものです。