Second day of our challenge… This time you will face collections. Specifically, a list that has acquired duplicates. We don’t like duplicates. Let’s get rid of them!

1. Fill in the code.
2. You can copy the code into IntelliJ/Android Studio, but it shouldn’t be necessary.
3. Click “run” – the green triangle. The code will compile and several tests will be run.
4. In the logs, you will see “try again” if the solution is incorrect, or “success” and a special code.
5. Provide this code in the form below along with your email and click “send”.
6. Solutions will be presented the next day on Instagram

ps. Again – there are few ways to achieve that 🙂