I cannot figure out

Question

Where is the unsafe or unchecked operation.
https://code.sololearn.com/ci396QRRtVnC/?ref=app

Answer 1

You have not provided any types. And after providing types of you are adding Integer, then set() method will show an error, since you are setting a String.
https://code.sololearn.com/c6Lqpd9DoNn5/?ref=app

Answer 2

Thank yoy mr khan